another culture shift "sex positive" now means "consenting adults are allowed to do what they want", while in the past there was "people who don't do kinky sex are making a mistake" (see "stranger in a strange land") or the free love cults of the 1800s where declining sex was seen as morally dubious. I happen to like the current sex positive position but the lack of the extreme pro-sex side is interesting. Though it is preserved telling by telling nerds to get laid.