Growing up we had 8 people with one toilet and one shower/bathtub combo. Not a lot of fun. No dilly-dallying in there.
Growing up we had six people sharing a kitchen sink and an outhouse.
Similar situation in my house growing up. Seven people, 1 shower. If you were not expedient, Dad was pounding on the door. If you were not efficient, tough.
Hair drying was done in your bedroom.
My current home has 3 bathrooms; two for the kids, and a master bath for my husband and I with a separate shower and tub. No lines, no pounding on the door.
Oddly enough, I can still wash my hair, body, brush my teeth, and dry off in five minutes if needed. The habits of youth don’t die.