9-year old (almost 10) year old boys ARE interested in sex. They might not be interested in sexual intercourse, but they are aware of pleasurable sensations and how to produce them. Masturbation is one way. Anyone who doesn't believe boys that age have erections or are interested in sexual feelings is kidding themselves. No offense to moms here, but I have found mothers of sons to be the worst as far as refusing to believe their sons find sexual activity pleasant. This happens at ANY age, too. I had a friend whose 20-something son fathered a child, yet was incredulous that he had had SEX. She swore her college-boy sports-nut son was "too busy" to be interested in sex. There isn't a man on the planet who is "too busy" to be interested in sex.