Ooops! Forgot the most important 'no'. Moron that I am!!! I'm shit at this so if anyone feels inspired to post, feel free, I'll try my best in the meantime.
Nope. This ones quite hard. I'll give you a clue for the 3rd image: it's the name of the painting that's important, because you can't actually tell what they're doing.
Haha...it could well be 'breast stroke' but it's not...it's more to do with which breast is being stroked.