"I'd never use a Unisex loo...
Whoever came out with that idea has to be crazy..."

I gather that you have at least two toilets in your home? lol

Sensitivity in these matters is a by-product of civilisation. If one were stranded on an island or was in caught in a struggle to survive I would wager that the niceties would be dispensed with quite rapidly.

I remember well, while growing up, that siblings and/or good friends would share the facilities matter of factly, not to mention quite amiably.