Most importantly the 1970s gave the world me.
My dad owned a gas station where we used to have "full service" in the 70s. I was working part time for him and was washing the windshield of a chevy van one day and this man stands up compLETELY NAKED and at 14, I got my first full look at a man's genitals in the front window! Needless to say, that was NOT the best memory of the 1970s, but its firmly implanted in my mind.