Do non cheaters exist?

Have you been faithful to your long term relationship? How long have you been in this relationship? Did you ever feel tempted and resisted or is it you just never experienced the need of it?

I am in a 5 year relationship (2 of them married) and I have never cheated. I feel i would never do it to him. But My gut feeling is telling me he has at some point.

The more i hear, read, see around… the more I feel 90% of people cheat. So I just want to know if thats just life and its meant to happen at some point in every relationship…. Or if it is possible to be faithful long term.

Need reassurance that world is not so fucked up that people stab so essily their loved ones. And if they do, whats the reason