I heard conversations between my bf and a female when neither were in the room. I once heard ppl talking thru the vent in a hotel room, telling me to kill myself, noone was there. I heard ppl talk about me when they weren't. That's just a few things I heard. It's different for different ppl. I once thought my bf and this chic he was working with was trying to kill me!
If he don't wanna talk about, don't push him, it can bring back bad memories or anxiety.