Not a literary theory here, but one about human behavior. This means that this theory is much more likely to be malarkey, but whatever. Maybe it’s actually a hypothesis?
Take as a given that males find women extra attractive when the woman is doing something. (I know this is at least true for me.) This can be professional in nature (writing computer code, arguing a case in front of a judge, shushing people in a library) or recreational (walking a dog, playing video games, dancing). I posit that the reason males find a woman engaged in some activity attractive is two-and-half-fold.
Fold one: a woman who is demonstrably interested in something is more interesting, having depth of character. Despite some popular depictions, the males I know want more from their romantic interests than a pretty face or generally callipygian physique. Women having an interest in something other than maintaining their looks shows she has some brain in her head.
Fold one-half: the interest the woman demonstrates may coincide with that of the male, giving a point of commonality. (‘Hey, you like motorcycles? So do I!’ or even ‘Hey, you serve me coffee? I like coffee!’)
Fold two: a woman engaged in some activity has a greater ability to fully demonstrate her giving in to passion. Yes, a male will find it hot for a woman to be engaged in sexual congress with him. However, it is much hotter is it when she throws aside her previous activity to engage in said congress because the male is just that sexy. For males, the small glimmer of hope that the attractive woman will sweep the table clean of dishes, or the desk clean of papers, and immediate jump his bones is quite captivating: it shows that she truly wants him. And that demonstration is impossible without the woman already doing something else.
Hey, I just realized I posted this on Valentine’s Day. I’m topical! Neat!