I, for example, am very turned on by contrasts. So noticeable height differences, size differences (individual body parts or the whole package), skin tone, shapes, etc.
I kinda wish my wife (who’s very pale) were bi because I would love to see her have sex with a dark skinned woman that’s a similar height and weight as her, or a short, petite woman (she’s also tall for a woman).
A woman wearing a thin choker, like a lace choker or a thin choker with a small pendant.
I’m not into BDSM, and I don’t link this with the meaning of being collared. I just like the esthetics of this kind of necklace.