I have a very specific shower routine. The way I undress, where I set my clothes, what station the radio is on, what volume the radio is set to, the starting temperature of the shower, the water pressure adjustment thing, the placement of my shampoo/conditioner/soap/washcloths, the way I put the shampoo/conditioner in my hair, the order I wash my body, the way I dry my body and exit the shower, the order I put in my contacts and brush my hair, etc.
If I shower in somebody else's shower, I have a really difficult time and usually end up rewashing my hair or body so I can do it the way I usually do.
It's really weird, and it might be an issue. whatever hahaha