Not every shower is a hair wash. Especially if you have long hair and shower daily it might be say a 1:4 ratio.
I advocate for headphones in those 75% of showers. Can be very nice.

I don't even have good speakers, so this ensures best sound quality. It also skips the setup steps, if you then proceed to commute to work say. Just a continuous music experience, and you'd have had to put them on later anyway.
Very fitting for the olde 5min shower out the door maneuver.