Ok, I'll bite...this is after-all something we can unite over...unlike U.S. politics.
Nylon stockings (especially black). That's what does it for me. Often, the girl/woman doesn't even have to be that good looking, though it helps. OMG do I miss the days when it seemed that more women than not wore hose. Crowded buses, classrooms, church....those places were all glorious adventures to me because of how many women were around in nylons. These days, I just dream of a job at the airport. ;(
Girls hardly ever wear 'em now and that's such a shame. They were so feminine and sexy and feeling of a woman's warm nylon encased leg touching me..... fuck.