If, by moment, you mean ad-driven sites can now do an entire product spread about this body part that is not just deodorant.
While product spreads about a specific body part or makeup look are common, seeing the armpit newly featured to sell product (primers! masks! soaps! deodorants!) has been one of those moments of transparency for me.
It's kind of how my (long ago) Intro to Anthropology class in college made us all read this description about a barbaric practice of dragging metal over people's body parts for all sorts of weirdly specific reasons. And you realized a paragraph into the piece that they're talking about...shaving. That when described in less familiar terms, it sounded absurd. Har har, anthro teacher, you got us. It sounds weird but most of our classmates do it. It's a weird thing that's just culturally acceptable so it no longer sounds weird.
Well, this was like that but instead I was like, "Oh, pits are having a moment?" the same way I'm regularly like, "Oh, a purple lip is neat-o? Let me click through to the slideshow!" But the hilarity of the armpit primer pulled back the curtain just a bit. (Sorry Meow Meow Tweet - normally I love you.) I mean, obviously it's all kind of ridiculous but moments like this remind me to see the man behind the curtain and take stock of how far I want to go with buying all this stuff -- from armpit primer to purple lipstick.