Oh the catholic guilt complexes, who says what is right or wrong anyway?

Using the word cheat to describe a natural human reaction to sexual attraction is just to add authority to those who make the rules in the first place.

What if we don't agree with those rules and laws?

As Bill says below, "know thyself & keep your own counsel." If you get caught out and you get judged then just shrug and accept or ignore it. It's nobody's business but your own.