Referring to kids as minors turns me on in the same way that calling myself a pedo does. I think it's to do with the forbidden nature of it

And also it feels good breaking any sex rule you aren't supposed to. Like if your parents tell you not to watch porn, I can tell you firsthand that that backfires constantly and results in the act being more sensually intense than if you had not said anything at all.

I think this could be because your brain realises that no punishment occur for breaking a rule, and so it makes that rule breaking more fun? But that's just my experience ;3