[tomp]

False dichotomies galore.

First of all, the "VAST MAJORITY" of human interactions are irrelevant (cashier, bank clerk, passing people on the street). Given how much time you spend with coworkers, they'd qualify as friends, or acquaintances at least.

Also, there's a large gap between "professional behaviour" and "orgies in the street" or "sexual harassment". For example, I don't mind talking about menstruation or condoms with friends (who I'm not having sex with, nor have/would I ever try) but I don't think those would be appropriate topics for most workplace situations.