Chances are, you know a mansplainer.
So what you do about it?
Make an "Actually" jar!
Give the jar to your mansplainer and make him put in a dollar every time he actuallys somebody.
Good work, team.
(This project was inspired by a friend, prone to mansplaining but still delightful, who asked that I not mention him by name but did say to "spread [the idea] like a man's legs across an entire subway bench.")