OK, "comment" was a poor choice of word.
Either way - mansplaining or the erectile joke - it's taking an annoying behaviour, dumping it on men (who are hardly the only sex to do it) and churning it out in every discussion about situations where men interact with women (or vice versa if you prefer ).
People can be irritating - deal with it. I'm pretty sure there are more productive things to discuss if we want to promote womens sport and the like. (it wasn't ME that brought it up first, BTW!)
This is a thread about women only audaxes.
Let's see how some comments I've heard over the years might sound to you, gender-twisted.
"I didn't know men could ride fixed!"
"I suppose it's possible some men might be strong enough to ride a fixed gear."
"Aren't you afraid being out alone? What if a strange woman attacked you?"
"I am making a movie [an adult explicit movie] about muscular men with short hair. Would you be in it?"
"You won't be able to put that tyre back on. Men's hands are too weak." Grabs wheel. "I'll do it for you."
"What do you do if you have a mechanical? Call your wife?"
"Careful there, handsome. You might break a nail."
Or some gender-twisted (wo)mensplaining/bikesplaining:
"I didn't know there were men who could build their own wheels."
"Are you telling me there's a man who knows how to put a chain on? I thought you'd be too worried about getting your hands dirty."
"Make sure you get that saddle height right, love. You don't want to be stuck when it goes up your [arse]." This was followed by some disgusting sound effects.
"That's not a 70" fixed. Must be a 63. Men can't ride more than 63" -- if you know what I mean, ha ha. Everyone knows men aren't too good at maths."
Imagine getting crap like that every time you were out with a bunch of people of the opposite sex, and then being told it has nothing to do with sexism but just people being idiots and you should "just deal with it." Why would you? I mean, really? Why would you?
A straight womansplaining might be a woman telling a man he's not putting a nappy on right, even if he's a stay-at-home dad with 5 kids, just because women know best how to take care of babies. For the record, if it needed saying, that also would be prejudiced and wrong.
Sam