I mean...you do understand that Secondary Sex Characteristics are inherently intended by biology to be arousing, right?
And that pubic/armpit hair growth are Secondary Sex Characteristics?
And that all women grow hair in those places?
And that it is a societal construct and literally NOTHING more than that that your brain is faked out into thinking that a perfectly normal secondary sex characteristic is disgusting or repugnant?
It only 'never crossed your mind' because you've been socially conditioned for it to not do so. Perhaps equating the perfectly normal and natural attraction we are HARD WIRED to feel with regard to these traits with 'interracial cuckoldry' is not the strongest or most sensible response you could formulate here.
I look at it and have a disgust response, I understand that. No one taught me to think body hair is gross, I don't like it on women or men.
Also, your whole spiel flies in the face of thousands of years of history, armpit hair has never been something that elicits lust in most all people. There were intricately detailed statues and paintings of women of all cultures that depict ideals for beauty, you know what I don't see on any of them?
Armpit hair.
It wouldn't even be hard to add, the artists spent hours or in some cases weeks on the head hair, and yet they didn't add armpit hair to either sex.
It's like body odor, it's a part of human existence but it's not something we find attractive. Quite the opposite, the first recorded case of deodorants date back to ancient Egypt and all higher cultures developed some kind of perfume or on-body incense to try to remove or cover up what you would call a "perfectly normal secondary sex characteristic".
Just because something is a normal part of the human body doesn't mean humans naturally find it attractive.
tl;dr: I am not trying to shame your kink, I am just saying most people don't share that kink.