So this is going to be really weird. My boyfriend and i have only done anal twice. The first time he didn't stick it all the way in so it wasn't that bad, but last night he stuck all the way in and came in my ass as soon as he did. I had diarrhea the next morning after both times. He came in my ass the furst time too. Is the cum causing the diarrhea? Kind if like an enema or is it the anal itself? Again, weird question I know.