This is a sex farce about the sexual revolution sweeping America during the late 1960s. The counter culture comes full circle in affluent Angelinos Bob (Robert Culp), Carol (Natalie Wood), Ted (Elliott Gould) and Alice (Dyan Cannon). Bob and Carol view themselves as in tune with the times, with occasional but not unlikeable smugness. The film begins with them visiting a retreat for spiritual and mental awakening. And they come away changed, especially Carol. So much so that Bob decides to have an affair and confess it to Carol. Carol thinks it's so wonderful she has one herself. I loved Natalie Wood's explaining to her angry husband, who walks in on her: "I wanted to do it. Because, I wanted to do it. I.... wanted to do it", while Bob's head is about to explode. He eventually calms down. Bob and Carol need to stay true to their ideals, and anger over an affair is an outdated 1950s response. Moreover, there's a difference between sex and love.
Their best friends, Ted and Alice, are solid philistines. But it's only a matter of time before Ted and Alice realize they're missing out. The performances are pitch perfect. Natalie Wood continues the hilarious neurosis of her Sex and the Single Girl (1964) character. Dyan Cannon's moral abhorrence becomes a comedy sketch when she's talking to her shrink, and in another sequence denying Ted sex as he begs like a teenager whose life depends on it. Inevitably, the couples swap partners, and it's filmed with remarkable poignancy.
The film remains fresh, and modern. Paul Mazursky directed and co-wrote it with Larry Tucker. They have affection for the characters, without mocking them, even the square Ted and Alice.
