The average man is 5"11.

The average woman is 5"8.

If the average man were to live until he was over 60 he would be 5"9

For the average woman she would be 5"7

Unrelated, the average man's penis is twice as large as his thumb

So if the average man shrunk by age 60 so would his penis.

By age age 160 his penis would be gone and the same for a woman's vagina.