From a utilitarian perspective, it makes sense why a society would want a quick and simple way to disambiguate between two common categories. When talking about

From a utilitarian perspective, it makes sense why a society would want a quick and simple way to disambiguate between two common categories. When talking about a heterosexual couple, one could say "he gave her", and the meaning of the statement is immediately understood. An alternative might be to have general reusable pronouns that can be reassigned, but that requires additional setup ("Jeff is ze, Stacy is xe", then the main clause, "ze gave xem".)