Just because:

A towel, [The Hitchhiker's Guide to the Galaxy] says, is about the most massively useful thing an interstellar hitchhiker can have.

Partly it has great practical value. You can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble-sanded beaches of Santraginus V, inhaling the heady sea vapors; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a miniraft down the slow heavy River Moth; wet it for use in hand-to-hand-combat; wrap it round your head to ward off noxious fumes or avoid the gaze of the Ravenous Bugblatter Beast of Traal (such a mind-boggingly stupid animal, it assumes that if you can't see it, it can't see you); you can wave your towel in emergencies as a distress signal, and of course dry yourself off with it if it still seems to be clean enough.

Douglas Adams (The Hitchhiker’s Guide to the Galaxy (Hitchhiker's Guide to the Galaxy, #1))

Alternative pro tip: forget to go to the gym, have towel

I've forgotton a towel when I went swimming before. Ended up using my shirt as a towel and dressing in just my sweater.

Make sure you remember your lock combo before locking your belongings up when you take a shower. I came back to my locker and couldn't open it once. No phone, no glasses, just flip flops in a towel. Not a fun experience. Thankfully I remembered the code before too embarrassingly long.

That is like the exact opposite of the thought you want to have in the shower.
Perfect.

I’ve done that before. It sucked cause it was also 14°F out. So I had to drive home in the cold while wet.

Wanna go get hiiiiiiiigh?

Just use the curtains

Maybe you could squeegee yourself on the funky floor tiles

Do you usually just walk back from the shower to your locker dripping water everywhere?

This is a Facebook thought imo