It sounds like you're confusing remorse with regret. I've only fucked a 5 twice. Once when I was young and thirsty, then once again when I was trying to hit a notch quota that I set for myself. Both times I felt like taking a bleach shower afterwards. As a strict rule I refuse to fuck anything under a 6. It's just not worth the mental anguish.
"Those who will not risk cannot win." -John Paul Jones