Women in various states of undress. Mostly the superlative state..
Sometimes exes just for realism of the image, or "women I didn't get" purely for insatiable lust.
Also just thought of one that sometimes makes an appearance.. basically the hottest look for me in a girl, is one who is pretty, small to medium breasts, in french knickers/girlboxers and a tight tshirt/camisole, no bra, and nipples showing through.
No idea why, but to me, that is perfection
