Glad to meet you, dw_bound. Here's my dare for you. I'm assuming that your wrist and ankle cuffs can be locked on. You'll also need to get one more piece of equipment: a stretchy yoga band.
To prepare, take the keys to your wrist cuffs and fold them into a pair of socks. Take the keys to your ankle cuffs and fold them into a pair of socks. If you have other metal keys or trinkets, fold them into other socks as well. Then place your socks in drawer that you can reach with your wrists at about waist height.
Go to another room in your apartment or house. Make sure you can crawl from that room to your sock drawer.
Tie rope around your waist and add a crotch rope to it.
Cuff your ankles together. Using the yoga band, tie your ankles to the waist rope behind you so that you're in something resembling a hog tie. Make the yoga band short enough that you have to really exert effort to stretch your legs straight.
Secure your ballgag into your mouth. Secure any nipple clamps you want to use. If you want to make it difficult, blindfold yourself.
Padlock your wrist cuffs to the waist rope in front. Be sure to thread the chain around the crotch rope so that you cannot pull your wrists up to your face to remove the gag, clamps, or blindfold. Lock your wrists into the cuffs.
To free yourself, you will need to wiggle your way to your sock drawer, force yourself to stand up straight so that you can reach the sock drawer, and pull out socks and unfold them to find the keys. If you are blindfolded, you will need to rely on your sense of touch and may need to unfold many sockets to locate the keys to release yourself.
There are a few other elements you can use to make your predicment more challenging:
- Use rope to bind your knees together. That will make wiggling to your sock drawer more difficult. It will also make balancing once standing up difficult.
- Wear some sort of gloves (rubber gloves, latex gloves, opera gloves, etc) that are thin enough to allow you to manipulate keys but thick enough to make using your senses of touch difficult. You'd be surprised how much we rely on our sense of touch (especially when blindfolded).
- If you have a second yoga band, you can use that to connect your wrist cuffs to your waist rope and crotch rope. You can then place your socks higher and have to streth both your feet/waist band and your waist/wrist band to reach the socks.
Some safety precautions:
- Measure out the length of yoga band and try it out before you tie yourself up. Your primary means of escape is through stretching the bands to reach the keys. If you've tied everything properly, you won't be able to untie the yoga bands. Therefore, getting the length right is important. If the band is too long, you can easily stretch it, and there's no challenge. If the band is too short, you won't be able to stretch it enough to escape.
- Have a backup escape plan. Depending on the level of risk with which you are comfortable, you may leave scissors somewhere so that you can crawl to it and cut the waist and crotch rope, or you may tie a backup key to your waist rope and promise to punish yourself if you use it. Whatever you decide, make sure you have some other way to get out in case you mismeasure the yoga band length.
- Resist the temptation to tie the yoga band around your limbs. Yoga bands contract, so if you tie it around a limb, it may cut off circulation. Tie it to your ropes and chains instead.
- This challenge has a risk of falling, especially if your ankles are secured closely together. You might want to move things so that if you should fall you will not seriously hurt yourself.
Let us know how it goes!
, looking for the combination lock blindfolded and opening it blindfolded to release the liberating key.
The ripping off was good, but not as intense as I thought. I might need plastic clothespins for that one. Also I was not patient enough for the combination lock, that became boring as well 
I don't have to be bound from start to end ^^