Pin down a liberal and ask them what “freedoms” they support that are unrelated to sexual indulgence and perversion.
There are none.
Excellent point.
Basically I think this entire aspect (sexual freedom) of the left-wing centers around the Marxist ideal of the abolition of family. The counter-culture movement and its sexual revolution were completely oriented towards the abolition of family and traditional morality.
It is anti-freedom and not pro-freedom at all.