(idiomatic) To maintain a polite manner of speaking.

(rhetorical question, colloquial) One should not do something that one has hired someone else to do.

(humorous) A supposed motto describing the dynamics of incest.

present participle of keep one's head above water

Third-person singular simple present indicative form of keep one's head above water

Alternative form of an apple a day keeps the doctor away

(idiomatic) To avoid revealing one's thoughts, circumstances, or plans.

Alternative form of keep one's head

A woman will be more interested in a man if he is not kind to her.

(informal) Treating women badly heightens their romantic/sexual attraction toward you.