A urologist had a leak in his bathroom on a Sunday. He called a plumber who charged him a £50 call out fee plus another £100 for fixing the problem in 15 minutes. The urologist was shocked and said to the plumber – I am a Urologist and I fix human water works and I don’t get paid this much. The plumber replied – I know – that is why I quit Urology and took up plumbing! More money, taps don’t bleed and you don’t need an anaesthetist!