Adam is correct in a lot he has to say. Masturbation is the steak and lobster for me and sex is the 3 day left overs, left overs are good but not like the real deal. That is coming from the person who prefers alone to w/ another person.

He may not be hiding it from you for the reasons you think. He may now feel pressure to keep it from you because he knows you do not like that he does it. It' s like a dieter hiding in the bathroom and eating a candy bar. That person doesn't want to be blamed and scolded for when caught. But to do it openly is asking for trouble for sure. Have you ever noticed when you diet you want what you can't have so much worse. When you are not dieting you have the ability to not be so out of control and obsessed. (That is how it is for me anyway) What if it were OK for him to do this. Do you think the newness of it being ok would wear off. At least the frequency would lower.