Solving the mystery of how bats pee

The answer, my friend, is that they don’t do it upside down. When bats have
to attend a nature’s call, they get straight and do it. The more than apt illustration makes up for my loss of words for furhter explanation.

If you haven’t seen a bat do this, be paitent and keep observing
(i.e. if you don’t want to believe us and have nothing better to do).