Is there a medical term for "shrinkage"?

Huh… Involuntary contraction of the cremaster muscle? I dunno. Funny how “shrinkage” is so much shorter (pun!?) and yet so much more descriptive of the phenomenon…

Do you mean atrophy? (When an organ or muscle etc. wastes away).

“Unfortunate” ;)

The water is too damn cold!

yeah, called a short penis!

Getting shorter as one ages is caused by shrinkage of vertebral disks.

I think we’re talking about penii here, folks.

As far as I know the closest thing is the cremasteric reflex, although that doesn’t fully account for everything that happens when the water is really cold!