Are you sure this isn't a wind up ?

Mind you I know some pretty freaky folk so it could be for real.
I know a girl who would love to be in your shoes as far as the strap on goes , but I doubt she would be very comfortable with the violence side of things.
I have one rule when it comes to pleasure :
If you don't enjoy it then you probably shouldn't do it at all, that goes for all parties involved.

PS I am glad my arse has only ever seen one way traffic.