It is said that it is not good for men to help women wash clothes, right? I know men and women don't wash clothes together.

Come on, this is superstition. Men and women don't wash clothes together. What shall we do after marriage? Maybe, after marriage, men and women will go their separate ways? Is this still life? Washing clothes now is nothing more than putting clothes and trousers in the automatic washing machine. How convenient! Don't be superstitious, it's a manifestation of male chauvinism.