The phone rings and the woman answers it..
"Hi, this is doctor jones ..is your husband there please?"
"Oh no I'm afraid he's in the shower, can I take a message?"
" Oh can you tell him I need him to bring me a urine sample, a faeces sample and a sperm sample please."
"Ok I'll tell him,"
So the man shouts down..
"Who was that?"..
"It was the doctor,"
"what did he want?"
"He said the next time you go to the surgery you need to take a pair of your underpants."