Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) familial male-limited precocious puberty ?
    ### Response:
    Familial male-limited precocious puberty is a condition that causes early sexual development in males; females are not affected. Boys with this disorder begin exhibiting the signs of puberty in early childhood, between the ages of 2 and 5. Signs of male puberty include a deepening voice, acne, increased body hair, underarm odor, growth of the penis and testes, and spontaneous erections.
    