Ping Pong Anyone

PING PONG ANYONE? A 20 year old man came into the ER with a stony mass in his rectum. He said that he and his boyfriend were fooling around with concrete mix, when his boyfriend had the idea of pouring the mix into his anus using a funnel (you'd do the same, I'm sure!)?!!. The concrete then hardened, (no shit Sherlock!), causing constipation and pain. Under general anesthesia, a perfect concrete cast of the man's rectum was removed along with a ping pong ball. (Boy - we live sheltered lives!)