Predicament coin against the wall

Description: As you might know, i'm very well into challenges... i came across this website that is full of challenges for people to try. they're all a bit kinky of course, as i'm reading through the site i came along a task that was described as obedience training. so, you should place a coin against the wall, and hold it there for several minutes that they would decide. i immediately got an idea, which was to keep the coin against the wall for as long as possible, lol. whenever i fail, i'll have to wear my chastity, but the tricky part of all this is that i'll be wearing nipple clamps, a vibrator & handcuffs on my back! let's start the game...!