I have a secret fantasy.  I can't tell anyone about it.  I get SO turned on watching a man get fucked up the ass.  I can't say when it started, but I have fantasized about it for years.  It doesn't matter if it's a man fucking a man, a woman with a strap-on, or solo with a dildo.  I love when he's laying on his back stroking his dick while getting fucked.  Watching him cum while getting fucked makes me so wet and I almost always cum when he does.  My husband would freak if he ever knew that while he's fucking me I am imagining that another man is fucking him in the ass.