Definition of mansplaining:
"a portmanteau of "man" and "explaining," referring to the act of a man explaining something to someone, typically a woman, in a condescending or patronizing way, assuming she lacks knowledge or understanding of the topic"
I believe anytime a man disagrees with a woman, then she will say it's mansplaining because all disagreement is condescending to many women.
So if this is the definition women want to use, then men need to mansplain way more.