What do you mean, your face is still small?

compliment the other person's face in a humorous way.

saying "I'm too young" is a common joke or ridicule. It means to praise the other person's face in a humorous way, which is usually used to describe women. This sentence implies that the facial features of the other person, especially the face shape or size, give people a feeling of cuteness or youth.

Everyone has different levels of understanding and acceptance, so when using this sentence, you should pay attention to the other person's feelings to ensure that it will not cause misunderstanding or discomfort.