My boyfriend (straight) was raped when he was around 10-12 years old by a friend's father. He told me this when we were talking about anal sex and I was joking about him ever doing it. He ended up telling me about the incident. The only other person he told this to was his ex-wife who kind of disregarded it. I listened to him, tried to be as supportive as possible without making a huge deal out of it so that he doesn't feel awkward. Everything is fine between us but I know he has some discomfort related to this but he doesn't share it with me and keeps joking around about everything in general. Sexually he seems ok with almost everything but sometimes I feel there are things which bug him. He did tell me that he used to have issues with anyone touching his butt, but seems ok when I do it. He said this incident was one of the reasons why he keeps a beard. He also has a history of REM sleep behaviour disorder where he feels that someone close to him (always a woman) is trying to hurt him and he wakes up trying to defend himself and takes a while to come back to reality. I don't know how to ask him or talk to him about it in detail. I don't want to be someone who reminds him of the incident. I really want him to be able to talk to me about this because it seems like he's never really spoken about this with anyone. I want him to know I'm there for him and always happy to just listen.