First, a unicorn was born,
and then hard erotica and soft porn.
something like that... (apparently, they switched the positions of "soft" and "hard" because usually they say it the other way around)
well, and the meaning... it's not literal, of course... I think that the unicorn here refers to a "dream" (or something pure and innocent), and erotica and porn refer to something dirty and vulgar... that is, there was a dream, but then it was perverted, spoiled, etc. (you can say a lot of things about it)
P.S. Vis, I just couldn't find another word)) and I don't want to offend you)
P.P.S. I downvoted because he thought his bad translation was correct and started laughing... you make conclusions quickly.