Some of you may find this humorous.
We have a 23-year-old that has reached the point in his life that he is trying to make many of life's decisions. Though he is a responsible kid for the most part, he is still 23 years old and has a tendency to think with his dick first and his head later. He is a bodybuilder so he gets a great deal of attention from both sexes. He has the look enough that many would find themselves on their back with their legs in the air for him. He right now rides both sides of the fence, and I don't worry about STD's because he was forced to go in to a hospice and see what can happen a few years ago.
In spite of being 5'5" and 215 with biceps approaching 19" he is still human and has limited energy as all of us do.
As a bodybuilder young kids gravitate to him because to them he looks like some sort of superhero or comic book character. He may be a bodybuilder who can bench press some pretty astounding numbers, but he is no match for a hyperactive 9 or 10-year-old. On multiple occasions we have had adult friends over and he has been the one run literally out of gas. The parents of these kids are in on it, but, it has really worked. He has been forced to learn about bottle feeding, the joys of dirty diapers and all the rest.
If you have kids reaching that age, I have found this to really work. At this point with my kid I would worry now far more about the heart attack that would result from a broken condom after the fun than I would about him taking a chance on unprotected sex.
It may be a wee bit of a mean trick, but I can guarantee you that it so far appears to have worked.
Food for Thought!