I have been living with my boyfriend for 8 months. We have great sex and are very loving to each other, but I have recently discovered that my boyfriend masturbates in his sleep.

Is this possible? He asks me to wake him up if it bothers me and he will turn over. His main point is that he really is asleep. Trust has never been a problem in our relationship, so I'm wondering if what he is saying is indeed the case.

He is probably telling you the truth. Some guys do masturbate casually in their sleep sometimes, perhaps when they're dreaming about masturbating – the way a dog "runs" in his sleep if he dreams about chasing a rabbit. My question, though, is why is this a concern for you? You mention trust – that suggests to me that you aren't exactly happy with the idea of him masturbating. If he were scratching itches in his sleep, I don't think you'd be likely to doubt him if he told you he was actually asleep when he did it. In fact, you probably would never confront him about it. My advice is to talk to him about masturbation. He almost certainly masturbates both in his sleep and in his waking life, whether he tells you or not. And if he is lying – if he isn't really asleep when he's doing it – he may be feeding you that excuse because he knows you don't approve. In either case, the healthy thing to do is to discuss the matter thoroughly. Otherwise, that trust you've built will begin to break down.