Hello. Nice to meet you.
Really, it is actually scary when it gets to that point. At least for me. I don't like it when it hurts to have a hard on. This has happened to me twice. I seem to only need a day or so to recover completely though. I know that my girlfriend has gotten to the point durring sex where it hurt, and also to the point where I could no longer fit because of swelling. That can be pretty scary too.