Which Tanner stage indicates the development of adult-like genitals and pubic hair spreading to medial thighs in males?

The Tanner stages of sexual maturity, particularly for males, describe the physical changes during puberty. Stage 5 represents the final phase of sexual maturity, characterized by the development of adult-like genitals and the spread of pubic hair to the medial thighs. At this stage, the male genitalia reach adult size and shape, and pubic hair exhibits a mature distribution pattern, similar to that seen in adults.

Stage 3, by contrast, involves increased growth of the penis and testicles, along with darker pubic hair, but does not yet display the full adult characteristics. Stage 4 features further development where the penis becomes larger and pubic hair covers a greater area, but it is still not to the extent seen in adults. There is no Tanner Stage 6; the stages do not extend beyond Stage 5. Therefore, identifying Stage 5 as the correct answer reflects an understanding of the culminating indicators of male sexual maturation during puberty.