That was my favorite rule. I loved it. I wasn't allowed to hang out alone with any sister, but it was ok to spend as much time with the brothers. For a gay man that arrangement cannot be better.
Seriously, they are so stupid and hung up on their ridiculous homophobic ways of thinking, that they pretend that those rule are supposed to keep people from doing anything they want to do. Those rules around people and sex ar just absurd. They are super simplistic, irrelevant, stupid, and trust me, they never stopped any JW I knew from doing whatever or whoever.