My husband has been complaining of 'an unusual skin condition' in a very sensitive place. It started quite suddenly and has gone on for a while. I am beginning to think that maybe he has contracted some sort of sti. He has never had this 'problem' before and it has come quite out of the blue. He won't let me see it which is making me even more suspicious. Have asked him about it but he just brushes it off. Last night I asked him outright if he was cheating and he denied it. what should I do?