Should I be concerned my son has a perverse nature?
It's obviously difficult for him to resist the inappropriate, occasional sexualized display when he feels it will net him "points" with his peers. He needs your understanding about how you know he finds it difficult sometimes to turn away from these behaviors and dares. Let's not lose sight of the fact that we are talking about only two incidents in two years. Work with him on being able to resist these dares and exposures. He needs to feel that he does not need to misbehave in this manner in order to be accepted and liked by his peers. Rehearse some dialogue with him about how he can reply to kids the next time one of them might egg him on. Encourage other positive parts of his personality that will surely cause other kids to want to be his friend. Don't shame him or make him feel dirty or perverse for doing these things. Let him know that you believe he is a great kid who needs to work more on not being influenced by others to perform risky behaviors.