1966-67: Star Trek and the "Theiss Titillation Theory"

William Ware Theiss was the costume designer for the original run of Star Trek, and his censor-skirting costumes like the ones above, from "What Are Little Girls Made Of?" and "Who Mourns for Adonis?" (l-r) inspired something called the "Theiss Titillation Theory." It states that "the degree to which a costume is considered sexy is directly proportional to how accident-prone it appears to be," and proves that sometimes when it comes to nudity, less is more.