'80s erotic

[Hardcore84]

Hello, I'm looking for an American film of the '80s in which two girls in a tub with a man you put in a topless scene, and a blonde girl holding up a sign in her hands she takes off her bra.
I do not remember other details, which film can be?

In another film ever in a bathtub, an old man is in the company gives a big tits round two but it's most recent film.
What is the title?

Thanks