I would like to think that I would never *ever* cheat on my significant other, but my body sometimes wants to do the wrong thing, if you know what I mean. I'm confident that I can control myself, but somewhere deep down inside you always think, "What if some random fine girl catches you off guard and is ready to pounce you?" Would you be strong enough to refuse?? *shudders* I think the concepts of 1) betrayal 2) sin 3) guilt 4) trust 5) love, etc. are strong enough to keep many people in check (me included), even in the face of wet poon and bouncing boobs. I think if you love someone and if they love you back, then you would never do that to them (or want them to do that to you).
Now I know my wife would never cheat on me, but I do worry sometimes because she's a sort of nympho who can't seem to get enough. I think I can keep her satisfied, but it's a lot of (fun) work! What if I'm on a business trip or we're apart for extended periods of time? I trust her 100%, but that drive of hers is something that worries me a tiny bit. If she cheated, I think I can forgive her, but I'd be DEVASTATED.