#3 Male Lactation

Alright, this one is a little unorthodox, so fair warning: there have been documented cases of men actually breastfeeding. Whoa!

In the 1890s, Prussian scientist Alexander von Humboldt saw many of these cases and wrote about them. He mentioned he saw a man breastfeed after his wife fell ill. And that he saw many instances in Brazil, with men stepping in when women had shriveled breasts.

There were even cases in German and Japanese camps during WWII, with some of the men spontaneously producing milk of their own.