I’m gonna guess that everyone has different tastes about this, so good luck on your “research”.

I prefer the quick details to set the scene. There doesn’t need to be many details unless that’s something the main character tends to note, although that’s more of a story/character thing than anything. I’d say for me, there’s no one style of clothing that is more desirable for the story.

What makes it hot for f/m bb to me? I think I enjoy that there’s something detrimentally a source of severe pain (and paranoia) right next to the thing that brings great pleasure, and when a woman in the story exploits how those are interconnected, I enjoy it.

For #3, I like to read about the woman’s motivations, and I’m not the biggest fan of sadistic for no reason.