God says one man, one woman, joined together as man and wife, for life, and any “joining” outside of that relationship is an afront to Him.
So, of course, the left, liberals, etc, to shake their fist at God, encourage behavior that is an afront to Him.
It's not just the left. Even here on FR, men who are sexually promiscuous are cheered (see all the "not guilty" and "I'd hit it" threads). Seems kind of hypocritical to criticize the women and not the men.