You've never showered with a girl? I mean this in a platonic way of course. I was always into outdoor sports. Canoeing, backpackpacking, climbing, sailing etc. The clubs in HS and college, as well as FTXs in ROTC were coed. By day 3, no one cared. The rule was "Japanese privacy". By that, I mean, when you shared the creek or hose or whatever was there, you just kept your eyes and hands to yourself. The girl you would have loved to have seen naked under normal circumstances? On the backpacking trip or kayak trip, you just didn't notice, because to do so would have been severly uncool and made you a pariah. Maybe its a generational thing (I'm 40), maybe its just a bunch of college kids scamming a van and gear from the school and eating out of cans to make a trip, but there was a definate set of rules. No scamming on the trip.
Oddly, when I went on the Old Man's Mid-Life crisis rafting trip in the Grand Canyon, the same rules applied. Peeing off the raft or skinny diping in the river to bathe was ok, even among staid middle aged types. The same rules applied. No one was on display, no one wanted attention, we all just wanted a bath. This wasn't a hippie commune, just a random commercial raft trip with 15 guests and 6 guides that had never met before. I guess the point is, if there is an understanding of what the rules are in a given set of circumstances, normal expectations fall away. The idea of my dad getting naked in public? Hell, I'd bet the farm against it. There, where everyone was quick and discreet and it was just something you did every day or two? It didn't phase him. Am I just weird, or does this make sense?
FQ13