...and a follow-up comment:
Here's a potential rule of thumb (via a fiendish thingy's comment upthread): Mansplaining when doing it to women, Whitesplaining when doing it to POC, Whitemansplaining when doing it to WOC, Cissplaining when doing it to Non-Cis, and when you do it to persons of your own category OR don't care what they are: just SPLAINING.
And there's a not-too-broad line between MeFi's already-defined "beanplating" and Splaining.
@MexicanYenta it's a proud tradition: Sitcomsplaining.
But when Ricky told Lucy SHE had a lot of 'splaining to do, it was a language issue, since the Spanish word for Splain is Splique...