It's a bit of a guilty pleasure...

Translation language

Meaning

I enjoy something even though it's perhaps not considered sophisticated or healthy.

John: I saw you eating a whole box of chocolates yesterday.

Alice: Oh, that. It's a bit of a guilty pleasure, I'll admit.

John: Nothing wrong with a little indulgence now and then.

Alice: You're right! But still, it's a bit of a guilty pleasure, isn’t it?