(of the giving of information) remaining secret or hidden until it is needed to be known (by a particular party).

Indicates that the speaker needs a person to guide him or her. / Indicates that the speaker needs a book or document to guide him or her.

(slang) to offer help when neccessary

Alternative form of a woman without a man is like a fish without a bicycle

If a friend helps you when you are in need, they are a true friend. / If one of your friends is in need of help, help them because they are your friend.

(colloquial, humorous, rhetorical question) Used to say that audience can predict the result of something.

Every man needs a woman as a romantic partner to spend his life with.

Asks the interlocutor if they require assistance.

Something good does not need to be advertised.

(idiomatic) Something not wanted by someone, who is already burdened.