"Marry whatever you want?" No, really not. No (or at least very, very, very few) liberal is in favor of marrying 10 years old, or marrying animals, or marrying robots. We're for the state not telling informed, consenting adults that they can't do something that affects no one else.
"Gonna change soon"? IT's already there, it's called death penalty, and it's a conservative thing. As for anything else, hah. Liberals may, at most, wind up supporting euthanasia, and even then we're not sure we do. And even if we do, for crying out loud: euthanasia is about letting people that are already dead (and expressed prior to that the wish to not be artificially maintained forever), or who actively want to die, die. Yeah, we liberals are big bad evil murderer for not being sure we should force people that want out to remain in this world. (Meanwhile, you conservatives are hanging, frying, poisoning or otherwise removing anybody that's been condemned, no matter how often it's been shown that your trial system is flawed and has resulted in dead innocents).
Ah, yes, of course. We liberals are all dangerous hippies. We smoke weed all the time, we get drunk all the time (...wait, I thought Joe Six-Packs was on the other side of the aisle?), we fornicate with everything that moves (and some things that don't), and damn the results, we're going to mass-murder them anyway! WHOOO, go, ammoral libruhls!
About the only difference in moral rules between you and I is that you believe you are such a righteous and good person that everyone should follow your moral rules. After all, you are a Good and Righteous man! Whereas I think that "Do unto others" (you know. The keystone of three-quarters of moral systems out there) naturally imply "Live and let live" - you wouldn't want to be forced to live by someone else's moral, so don't try to force someone else to live by yours.