I have always had a kink for SB using medical restraints and being strapped to the bed. I cant remember when i first developed these feelings, but i must have been a little kid when i first felt the urge to experiment with things like car seat belts or otherwise trying to tie myself down. I actually remember an incident when i was 4-5 years old when i used a rope and tied myself to a chair, and my grandfather had to cut the rope in order to release me....
I also identify as ABDL which means i have a desire to wear diapers. And combining these kinks feels absolutely great. I started wearing adult diapers when i was about 16 years old. And when i finally was able to move out on my own, one of the first thinks i did was to buy a full set of Segufix restraints and a few ice-locks of various sizes. I then started experimenting with SB in Segufix and diapers.
In the beginning i only used restraints around my wrists and feet, i also used an icelock that would only last for an hour so. Besides i also had i backup release method that i could use if i wanted to escape. However in order to truly get that true SB-sensation i quickly advanced to a setup with a full set of restraints and a 10-hour icelock. I also ditched the backup release. This means that my setup is totally inescapable, so once i strap myself down to the bed i will be in for a 10 hour ride, so changing my mind during the session is futile. I am aware that this is risky and this is not something i would recommend to others, this is my personal choice.
So whats in it for me?
Well, if i have to sort out all the different feelings i associate with SB it must be something like this:
1. The feeling of true helplessnessI assume most people on this board can identify this feeling. Its very simple, i like to be in a position where i am a prisoner, being unable to move and no longer being in charge of my body. As mentioned, SB wouldn't be "real" if i could just activate the backup release or otherwise escape when i wanted to. There has to be a real risk involved. Thats why i decided to ditch the backup release, i also strap myself down in such a manner that i know for a fact that i will truly be stuck, and i dont mean "stuck" as in "hard to wiggle myself out". It means that if anything goes wrong i will be STUCK! In other words once the last lock is locked it will truly be the point of no return. And the only way to get free is when the ice lock releases. I also need a feeling of truly being punished, thats why i use an ice lock that lasts for 10 hours. Yes, 10 hours can be long and tedious, but SB wouldn't be the same if i knew that i would be released in a short time.
2.
The rush when the final lock clicks in placeStrapping myself down with a full set of Segufix actually takes some time as there are many locks. I start with my legs and thighs. And then i fasten my waist, groin, chest and shoulders. I always make sure every lock is correctly fastened, so i know for a fact that getting out is impossible. Again, SB wouldn't really be exciting if i knew some clever way to get our early, so i have made sure to close every loophole in my setup. Segufix is pretty much escape proof by itself, but in addition i have also made sure that i cant reach the keys or use any other method to escape.
I then move on to the final step of securing my wrists. I then lock down my right wrist, and now i only have my left wrist unsecured. This means that this is the absolute final chance of changig my mind. And a very distinct feeling flow trough my body, i can only identify it as a mix between doubt, adrenaline, fear and excitement. I always take a pause and ponder for a few minutes, while tonnes of questions goes trough my brain
....Is this really safe?
....Are you aware of the fact that you will be confined to the bed for 10 hours?
.....Have you any idea of how long 10 hours actually is?
.....Are you aware of the fact that the Segufix restraints are inescapable?
I always answer myself with HELL YEAH, while i smash my remaining free wrist towards the lock and i hear the final *CLICK*
And a rush of adrenaline goes trough my body and it feels like i am riding a rocket into a black hole.
HOH-LEE-SHIT, did i really do this?
At this point i always start masturbating, but both of my hands are tied and i wear a diaper, and on top of that my groin is covered and secured by the belts. This makes it really hard to masturbate in the traditional sense, so instead i solve this by making pelvic thrusts against the belt that covers my groin. I am usually so excited that i ejaculate within a minute or so. And again i feel like i am floating through outer space and into other dimensions
3. The feeling of trying to escape, but failing miserably each timeAfter a few minutes of just experiencing this awesome euphoria, the excitement starts to fade. Every guy knows that after ejaculating we get a refractory period (or "post nut clarity), a state where the excitement suddenly disappears and reality starts to sink in. And i am just like ...Ehhh....did i really lock myself down?
...And am i really gonna stay here for 10 hours?"
Realizing what i have just done my mind gets filled by doubt and boredom. But perhaps i dont have to stay here in bed at all? Perhaps i can get out of these restraints and continue my day as normal?
And at this point i usually enter the "escape-phase" of the session. This means that i try every imaginable method of getting loose
I pull the belts as hard as i can, but they wont budge.
I try to wiggle myself out, but the belts allow only a few centimetres of movement.
I try to pull every lock to see if they open miraculously, only to discover that they are indeed locked.
I then make a last ditch attempt to tear up the belts by straining every muscle in my body and violently pull them apart, and at this point i am really fighting in anger against the belts. I pull, punch, kick and wiggle, but every movement i make gets firmly stopped by the belts.
And after a few minutes of what feels like an eternity of desperation i realize that i am indeed trapped and there is no such thing as escaping. I can only lie flat on the bed and stare at the ceiling, and if i try to move any part of my body more than a few centimetres the belts will mercilessly hold me down.
4. The feeling of being forced to use a diaper.(Warning: Graphic content)
As mentioned i also enjoy wearing diapers, and when im strapped down for 10 hours its only a matter of time before certain bodily functions needs to be addressed. I also wear diapers outside SB, but i dont get the same thrill and excitement because i can always choose to remove the diaper at any time and just use the toilet the regular way. (And for those who are wondering, YES i do both #1 AND #2 in diapers). However when in restraints i obviously dont have the option of using the toilet, so in reality i am now in a position where i am FORCED to use the diaper. If i want to spice things up i can drink a lot of water and even use laxatives before i start the session and soon my bladder and colon is literally screaming for me to run to the toilet, but the only thing i can do is to lie there and wait for the inevitable.... I usually have this contest with myself to see how long i can keep it in, and the pressure builds up in my stomach to the point that i am getting cramps. After 15 - 20 minutes the cramps are so intense and my sphincter muscle is literally numb, so no matter how much strength and willpower i can muster i always have to give in and my diaper gets flooded.
5. The feeling of being calm and comfyDespite the fact that i wear a soiled diaper and i have a huge desire to be released from the restraints, I have now accepted the situation and realized that i will be stuck in this bed for a long time, and i might as well make the best out of it.
I have to admit that being strapped down in Segufix is actually quite comfortable, the belts are really soft and wont cause sores or put pressure on my skin. And as long as im not actively fighting to get out i sometimes forget that i am in restraints. However when i make abrupt movements, the belts will firmly hold me down. I usually get some rest, meditate or even get a few hours of sleep. Its really calming to just lie there and think about life's mysteries or otherwise just let my mind wander freely. This feeling of being calm while restrained can actually being compared to being tucked into weighted blanket, as the belts puts a firm, but soft pressure on my entire body without causing constraints. And this is not something i make up - Using restraints actually works as a tool to counter stress and anxiety for me
6. The feeling of relief when the ice lock melts and I'm finally free.After 8 to 9 hours i usually get really bored, and my entire body starts to feel stiff. I usually just stare at the clock for the last 2 hours in pure boredom, before the ice lock finally melts and i can unlock the restraints. I have to stand up really slow because i always feel dizzy afterwards. I take a huge sigh of relief before a get into the shower.
So yeah, OP asked about what SB is to me? Well it turns out that for for me SB is a complete roller-coaster of emotions

This was a fairly long post, but i couldn't figure out how to write a shorter text.
