Is it normal to shower in the dark?
Yep.Totally normal
Yes, showering in the dark is a normal preference. Some people find it calming or enjoy avoiding bright lights; just make sure you can see well enough to move around safely.
Totally normal. A dim or dark shower can feel relaxing, give you a break from bright lights, or make an ordinary routine feel a little more peaceful. People have different preferences, and this is one of those harmless personal quirks.