My tummy hurts again

I think I've been MSG'd by a bowl of Ichiban noodles.

Earlier today the plant's maintenance foreman came into my office to yack with me about something. When I eventually got up to grab a glass of water from the cooler, he turned around to check the fax machine for a service quotation that he was expecting. I saw my opportunity and grabbed a handful of his coveralls at the back of the waist, then gave him a couple of sharp yoinks. He was a little surprised at first, then just put his hand on his back and slumped over a bit, looking at me all sad and hurt-like. I responded with a silly grin, and then he exclaimed:
"Ooowwwwww.... you broke my hymen".
Maybe you had to be there, but I've been laughing all day since.