Conversation so far:
where is the scrotum located on a male?
The scrotum is a part of the external male genitalia located behind and underneath the penis.
what is the function of the scrotum?
The scrotum has a protective function and acts as a climate control system for the testes.

Question: what causes the wrinkly apperance?
Self-contained rewrite: what causes the wrinkly appearance of the scrotum?