Beautiful Agony is a pay site, but they always have one free sample video on the front page that changes as new videos come in. The free ones are of varying interest (sometimes guys, sometimes girls, sometimes gentle, sometimes energetic) ... the one that happens to be up right now (5/15/10) will probably be up for about 5-6 days and I find incredibly hot. I've always relished watching women's facial expressions during orgasm, and frequently that image alone pushes me over the edge. There is a very unique aesthestic to Beautiful Agony and it fills a niche of eroticism that is barely noticed in the overwhelming sameness of other porn. And if the original question was "what do different peoples faces look like while they're orgasming?" you can scroll through hundreds (more than 1800 at last count) of thumbnails that typically show the Big O moment ... that should be more than enough to get a general idea of how insanely stupid humans look (out of context) when orgasming. Although I can't think of anything more sexy when it's happening.