Parents Guide for
Monkey Business (1931) More at IMDbPro »

Groucho makes references to stealing other men's wives.

There is a brief scene where handguns are brandished in a non-threatening manner when the Marx brothers are acting as bodyguards for the racketeer.

There are a few scenes of mild cartoonish violence as the ship's crew attempt to catch the brothers.

Some fighting at the end of the film. Mild.

None.

There is a scene where Zeppo and Harpo bother two older gentlemen playing chess with cigarettes in their hands.

None. Although just like the other Marx Brothers movies, this is quite a surreal and weird film at times...