While I'm not taking anything away from the fact that this is funny, it was meant to be full of innuendos. It was a gag for a Christmas party contest. It's still funny mind you, just not as funny as if it had been unintentional. I don't have the first site I read this on since the site is down right now, but here is a statement from one site I found. Hopefully I can find the site that explains it, although these should do. And this one from imdb.com: