There's 2 explanations here :
- snowflakes syndrome: they enjoy it, but got shame on it so much that they'll overreact to any mention of despiting y*ff, especially from their group.
- guilt syndrome: they enjoy it, but feel ashamed and guilty of doing so, so they'll instantly go on the defensive when it's mentioned.
In any case, your opinion is 100% valid and I despite y*ff even more than p*rn, knowing that it is even more "bestial".