Public Harassment: Man touching his penis.

Was on the downtown 3 train this afternoon and this man sat down to next to me while I was reading my book , I noticed that he was touching himself oddly but didn’t see his penis at this time , it was only until I got up from my seat to get off at times Square that I saw he was touching his penis underneath this bag, I immediately alerted him and the whole train that he was touching his penis , he of course denied it but I saw what he was doing, this is unacceptable, I take the train as well as my daughter and I will not tolerate this by staying quiet.