Reminds me of a quite clean one. The 3 chinese tortures.
A guy was lost in the Himalaya mountains. He was starving and frozen when an old man found him and gave him shelter in his home. He had a young daughter, whose beauty had no match. The guy hadn't met any woman for ages was tempted to shag her. The old man said:
_ if you touch a hair of her then you'll face the 3 Chinese torture.
The night came, the guy couldn't sleep, since he was still obsessed with that heavenly beauty (and also obsessed with something else of course...). Finally he couldn't resist and called the girl. They made love hours and hours, she made him go wild etc.. etc.. (I'll skip the very boring details, for there are young femal readers by there). After being exhausted, he thought:
_ damn that was incredibly good. Now I don't care having to bear the torture.
And fell aslept. The day after, he woke up and saw a heavy stone on his belly, on the rock a paper said "This is the 1st torture".
_ Stupid old man, he calls that a torture. A stone on my body.
Then he took the stone, threw it out of the window. While the stone was falling, he could see the stone was drawing a string and and a paper: "Torture 2: your left bullock bound to the stone you just threw away".
_ Waaah, that's gonna really hurt. I'll go and jump out of the window too. Suicide is better than suffering that awful torture. Then he ran and jumped out. And read on the outside wall: Torture 3: right bullock bound to the bed.