Ancient Rome: Romantic Sexual Imagery
Credit: Wikipedia

Statues and drawings of people engaging in sexual acts were also fairly common in Rome but instead of being used to excite, they were revered in an almost romantic way. "If you had sex with a beautiful partner, of either sex, it was considered to be a great gift from the gods of love," says John Clarke, professor of fine arts at the University of Texas. These figures were an homage to the blessing of sex, not intended to stimulate.

There was also a third category of sexual imagery in ancient Rome, which came in the form of sex manuals. These could probably been seen as explicit today but back then were meant to be instructive, more like a medical text than a Playboy.