I have mentioned this to him a few times in bed and he will start stroking himself but after a minute or so he stops and turns his attention back to me. Is it nervousness or embarrassment that keeps him from masturbating in front of me? I’ve told him we can masturbate together but it doesn’t change anything. He has told me when he’s alone at his place it can take him sometimes 30 min or more to cum when masturbating.