I'm not sure that this will prove that you are strong-willed. Some folks have sex drives they can ignore, say, by doing crossword puzzles; others will find a clue triggering a sexual response and just have to get off right there (a good reason not to do crosswords on the train when you're a little behind on satisfying your libido).
So, if you can do this, it's because you can anyway. If you fail, hey you're one of the randy ones that shouldn't even be trying this shit.
good luck.
Don't flagellate yourself (unless you're into that!)
B