This is some new age Costanza shit.

Joking aside, I find this far more in newer European hotels for whatever reason (though I'm sure it exists stateside and elsewhere too). My wife and I at this point just agree to tell each other when we're going to occupy it because we don't feel like it getting weird. Feels like - if the conspiracy-ish theory of it being used to dissuade people sharing rooms is true - they're inadvertently throwing out the couples dynamic.

To borrow another Seinfeld bit: there's good naked and bad naked. The glass door problem invites the latter.