Well, I've gone to school in Sweden, Belgium and the UK. In Sweden everyone showers after PE/Gym/Sports/whatever you want to call it. (Well, all except me, because I'm British and neurotic.) Not showering, unless it's the last class of the day and you're going straight home, is considered terribly uncouth and dirty. After and before swimming in a public pool, showering is absolutely mandatory - many pools even state that swimming costumes are not to be worn when showering. I don't go swimming these days.
In the UK, there were showers, but nobody ever used them. Showers (with trunks/costumes on) still mandated after swimming, though, because of the chlorine.
In Belgium, showers were provided, and many people did shower after PE if they had time, but it wasn't mandatory.
During my military service we had communal showers and communal dorms. At that point, it pretty much becomes a non-issue, particularly when you're sharing your living areas with female soldiers as well.
I have never encountered any actual overt comparisons, though my wife tells me I'd be a firm favourite.