I recently was informed by a friend that my son had touched her sons penis, and kissed him on the lips. She is concerned yet supportive, and is concerned as to where my son got this behavior. After talking to my child, I didnt find anything unusual, he did say that his brother (7)has touched his penis, however after more questions with the both of them, I feel that it was nothing more than typical boy behavior, accidental touching, poking at each other and pee on you type jokes. I really feel that my kids are being truthfull, as the seperate questioning has come up with very similar answers, but my 4 year old cant seem to tell me where he saw this behavior. I am very concerned and bothered by this situation.......any thoughts?