I remember when my wife told my son that Mammies don't have willies, she was told "go to the shop and buy one"
Another tale that sticks in my mind was told by my supervisor years ago. He was taking his 5 year old daughter home from Chester Zoo along the M56 when he got cut up. He mumbled an expletive at the driver responsible. Two days later, with the in-laws round for tea, his daughter piped up with the question, "Daddy, what's a f*cking pudding?"