MSN Health rambles a bit about male sex mysteries, and acts like they know alot, but it's a lot of fluff. First of all, we sleep after sex because it's a lot of fucking work. I take a nap after mowing the lawn or changing my brake pads, and nobody writes a book about those gender mysteries. The most excellent part: my penis is a barometer. Pay attention, baby, you'll know when the storm is a'comin'.