I'm 'Lovin' the McDonald vid, nice link lip.

The old style animators used to 'slip' a few naughty frames into some of their cartoons.

There's a memorable example in a 'Betty Boop' cartoon where, for a few frames, you get a clear shot of her . . ahem . 'snatch'.
Maybe that's why I've always been attracted to girls with chubby cheeks and big foreheads?