Years of 'studying' homo sapiens in bars has made me keenly aware that while the female of the species does urinal visits preferably in groups of 2+, the males abhore any joint visits to the bathroom facilities and will go out of their way waiting for the previous guy in the group to return from the bog before venturing forward themselves.
Writers for TV know this very well. Notice how it's a trope in many sitcoms and dramas for two women to visit the restaurant ladies room at the same time when one of the men they're with makes a faux pas.
