An excellent essay looks into just why the liberals want the Church to change its moral teachings. Hint: it's not to help the Church. Quite the contrary.
Bottom line, a sin is a sin is a sin. I have to repent of mine. You have to repent of yours. Practicing homosexuals have to repent of theirs. No one is exempt. No one gets to make excuses. Or the Church is not the Church. Period.
H/T The Anchoress.