Two men are chatting in the pub. One of them asks his friend how is wife is and the other replies that he is thinking of leaving her. "Why on earth are you thinking of doing that?" He asks. "Its our sex life, the spark has gone. I'm totally bored with just banging away at the same hole all the time." His friend replies that it is possible to spice up a relationship, "You know that now and again you could always flip her over and have a bit of fun with the other hole down there" The first man replies, "What?, and have a house full of bloody kids!"