When the fine lady you're with agrees to anal but has an arse is so filthy you can't even be sure there's a definite hole, you go ahead with it then switch
real quick to her
snatch to
teach her a lesson with your shit covered dick.
Tim: Did she finally let you
in the back door?
Mike: Yeah, but she was so gross I had to
give her the Scottish Bog Trotter so she'd clean her
shit up.