I always noticve women smokers, a special interest of mine. Also their breasts, not necessarily big but just nice, how they carry, firm or sagging, both appeal to me. Dress too, and of course the aura of the woman. Some just seem to send the message of "I need to be punished" or "I'd like to have you as a slave.! I also notice some women looking at me the same way with interest. Maybe it's my red hair & they're wondering if my pubic hair is red too (it is!). Sorry this answer is really "All of the ABove" but for me it is. Hope this helps some in your "research"!