just because there is no reproductive purpose of two men/women having sex does not equate to that being wrong. what kind of logic is that. there are many things we do that don't have a practical purpose, it does not make them wrong.
what do you even mean by wrong anyway? wrong on whose terms? who are we answering to?
if you deem it "morally wrong", why? who is it hurting? what harm is it doing? it's only doing good if you ask me, more love and happiness in the world. if it's wrong due to religious beliefs, who are you to dictate that your religious views are correct?