Here is Bridgette Bardot in 'And God Created Woman'. An Italian film from 1957. I'd always heard of the movie and saw the still photos of Bardot's gorgeous butt, but I'd never actually got around to watching the actual scene, and this is in HD quality.
To tell the truth, actresses from the 40's and 50's never appealed to me. And this is going to sound strange, but its because of the hairstyles.
But this shot of Bardot with her hair down is very inticing.