This is the natural progression of liberalism.
If one is to be "progressive," then they must be constantly pushing the envelope. On the issue of sexuality, years ago divorce was considered a bad thing, something just not done in society. The idea of two people having sex prior to marriage was just hush-hush if it was found out, much less pregnancy out of wedlock.
Today, all these things are common-place and most people never even thinks about them. That's liberal progress. So now it's homo marriage. And eventually that will be common place, so what's next? Multi-partner marriage would be a natural extension. But eventually you get to Age of Consent laws, which is where liberalism is headed.
They can't talk about it now, and some might even repel if confronted with that as eventually happening. But it only means that future liberals will look back on the liberals of today and think of them as ultra RWNJ's.
Beyond that, it's whatever their sick little minds can dream up. And they never fall short of ways to become more deviant.
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