7. Ann-Margret in The Swinger (1966)
The Swinger could easily have been made today, and it's almost unbelievable that it was made in 1966. As a goody-two-shoes writer, Ann-Margret tries to impress men at a magazine called Girl-Lure. How does she do this? She pretends she's a swinger and stages an orgy at her place. Through the film, the bikini-clad actress redefined the meaning of taboo. We'd go as far as saying her swimsuits started the "free love" craze.