Just ask "your friend " if "he" would pay that much to knock on her back door, if "he" says no then "he" can find a cheaper door to knock on
il put it this way if i wasn't married and i was in this position my trousers would have already hit the ground
It's only special if you have feelings for the other person. If you don't, then it's just a lot of sexy fun. Except when it's not.