A young man staying at a hotel in London on the night before
his marriage removes a card offering sexual services from a nearby telephone
box.
Back at the hotel he rings the number and a lady with a silky soft sexy voice asks if she can be of assistance.
The young guy nervously says he is getting married in the
morning and wants a complete sex lesson, in every position, and including some
bondage, then asks her "what do you think?"
The lady says 'That sounds a really good idea, but if you press 9 first you'll get an outside line'.