Then a man arrived to tell all the women they were wrong and imagining it and it couldn't happen because, as a man (who, funnily enough, described himself as a classic case of 'nice guy') HE knew it wasn't real, therefore it wasn't.
I was quite proud of myself for not suggesting he go fuck himself getting caught up in his argument, given that he appeared to be proving my point without my input.
Superiority explaining is one thing, and very annoying, but mansplaining as a subset of it assumes (1) that women should automatically attend to a man's explanation and give it their full attention until he has officially ended the conversation and (2) that a man has a valuable and unique contribution to the discussion at hand simply because he has a penis, rather than eg a relevant PhD, first-hand experience, etc.
I think (1) is the more patriarchal though tbh: the assumption that what a man has to say must automatically take priority over anything any woman has to say.
On MN I've noticed that any post that begins "well I'm a man and I think" will derail the thread because until every single one of his points has been gratefully acknowledged he will keep bringing them up, however irrelevant or tangential.
If you need to tell us that you're a man, that ought to mean you're explaining what it feels like to own a penis (etc) otherwise it's very rarely going to be relevant. Saying you're a man before you expound upon road conditions, exam results, potty training or anything else is simply claiming privilege.