Jhulan! , you 'The Woman and the Man"

What does "Man up" or a "Wolf Up" really mean?

The following article has appeared in the New York Times and the Reader's Digest.
It deserves to be read aloud, like a story teller telling a story to his/her audience

https://www.nytimes.com/2015/06/06/opinion/tapping-your-inner-wolf.html