Why is it that women (most, anyways) can't find the humor in a well-timed fart or a good fart story? Farts happen...

While talking to a friend on the phone today, I farted in the receiver. I laughed until tears streamed down my face. My friend asked, "What was that?" I told him it was just the wind. My wife didn't see the hilarity of the story...& in fact called me "a pig," before questioning whether I was getting manic. Bipolar disorder & fart humor...connection, coincidence, or am I just a pig?