During Daphne's 'Train Party' there are a lot of bare legs on display when all the girls decide to join in. All feet are also bare, and whilst fairly innocent today, these were body parts generally covered up in films made prior to the 1960s.
Marilyn Monroe lies on top of Tony Curtis on a couch while they make out with each other
A woman wears a dress in which her breasts are almost completely bare except for some covering of her nipples. However the film is black and white so it is difficult to see clearly
Scenes of two characters kissing on a couch (no sexual activity).
Characters frequently scantily clad.
Some sexual innuendo and play with sexual identity in the dialog.
Humor is often based on sexual confusion and comic sexual situations
Comic verbal innuendo
At one point, it is implied a man (desguised a woman) has an erection