Treating adults equally regardless of gender is a part of what we expect of others we interact with. It&#x27;s a pretty major clash with something that doesn&#x27;t really fall under religion, but the even more general social values we use to form a society.<p>If this person wants to avoid women, he should do what other reasonable people do to accomodate themselves: arrange for it in advance, without inconveniencing others. Telling people to their face that you can&#x27;t sit next to them breaks most social rules.