we're not supposed to sin because we know God will forgive us

I never said otherwise. In fact, I specifically said, and I quote:

That's not a license to go out and sin

Don't fool yourselves into thinking you are not doing wrong

Don't fool yourself into thinking you know what everyone is doing.

Take it from a Sunday School Teacher.

Don't fool yourself into thinking you're the only sunday school teacher here either.

Lust is sin. It doesn't matter whether it is homosexual, heterosexual, or pedosexual. When we lust, we sin. When we don't, we aren't sinning (assuming you aren't committing some other sin at the moment). This is nothing special. It is no different from the way heterosexuals sin.