This has happened to me 4 times now.
Friends girlfriend gets your phone number from your mate "so she can set you up with her sister" and then promptly begins sending you dirty text messages and saying things that make you need to cross your legs in public. She then says that she has to have you and that she never liked your mate much in the first place. Do you:
a) respond in kind with the text messgages/phone calls but not take it any further.
b) tell her that you have too much respect for your mate and that it wont ever happen. Ever.
c) throw caution to the wind and do the dirty on your mate, only to be wracked with guilt and, when she is with him, jealousy.

Spoiler alert!

I chose b,a,a,c (in that order)
( Nimble Colin camera-wrangling, globe-trotting whisky enthusiast, Wed 19 May 2004, 11:55, Reply)