The way spiders move their legs. This seems to be what freaks out most spider-haters. Also, specific girls (mostly ones with brilliant English/Scottish/Irish accents). That's not to say that all the other men out there hate girls, but there's some I respect purely for their beauty. I never see them as girls I could really 'fall in love with', but they are basically like a beautiful landscape to me - their beauty can make me cheerful and I feel 'honored' to be allowed to be near them/see them. Emma Watson's probably an example here.
Very interesting thread. There's prolly more, but I'm kind of sucked dry at the moment.