Why does science fiction love extra breasts so much? Blame Douglas Adams, who threw in a reference to the triple-breasted whore Eccentrica Gallumbits in Hitchhiker's Guide to the Galaxy. It sounded all sophisticated and sly coming from a Brit. But then William Shatner and Paul Verhoeven got their hands on the concept. Star Trek V, Shatner's directorial debut and swansong, features a three-breasted cat dancer (above) who wrestles Captain Kirk. In Total Recall a year later, a sex-worker flashes her accessory breast at Arnie, who miraculously doesn't grope her. How long before we have three breasts in 3-D? Find out in our gallery. (NSFW below the fold.)