When reading lots of the posts above, I keep on seeing the same pattern I see with my wife.
Before us guys are able to show off our women, they first need to agree to pose naked for pics or go naked in public at beach, sauna, pool etc.
Now my wife always claimed she does all those things because it makes me happy and proud. Just as long her face is not recognisable in the pics I post online (hard to go faceless at the nude beach or sauna 😉

. And yes, it makes me proud and excites me.
But throughout the years I noticed more and more how she likes it herself, takes initiatives and even tries to convince others to join us (at the sauna). As long as she has some control of who gets to see her topless/naked and always having "plausible deniability" when going braless or wearing something sheer while maybe "accidentally" exposing just a little too much flesh or nipple.
So my conclusion actually is that for the same reasons we like to show our wife naked, they like to be shown naked 🤔😁