We know it was you, Buzz - may as well 'fess up.
Buzz really did piss himself on the moon.
Armstrong landed the LM so softly, the shocks in the landing gear didn't compress nearly as much as anticipated. So there was a big drop from the bottom step of the ladder to the surface of the moon. When Aldrin stepped off, he hit hard enough that it tore the bag or urine in his space suit loose from its moorings and the bag burst. He made his first moonwalk with boots full of pee.