It sounds like its possessed. You should probably cut it off as soon as you can to get the demon out of him.
It's an STD. I hope you didn't let it touch you, it's really bad. If you did, don't be surprised when your boobs start moving around by themselves. Get to the doctor right away.
Absolutely...there's a muscle that we can squeeze that moves our dick...it's the same muscle you move when you do kegel exercises...makes my dick move up and down a bit
Can't get any more realistic than this. :nopity: <--- there's my little sad violin music because I feel so bad. ok, not really.
Just in case you aren't trolling. It is normal. As youngnpassion stated, men can flex the muscle used to do kegels and can make it move. It is more noticeable the more erect it gets. Yes I know I'm a sucker, but you never know.
I agree with Ruby. Cut it off IMMEDIATELY. I'd wait and do it while he's sleeping, so his dick doesn't see you coming and try to fight back.