Bull****e, Tweety. We're talking about duty- if you can't fulfill the commitment then don't make it.
I don't want to share this about myself, necessarily, because it'll seem like I'm bragging, but- I'm a pretty studly guy. Basically, chicks dig me- but I understand they're drawn by raw animal magnitism towards me, and I know most women see me as a sex object and only wish for the physical copulation only I can provide in their otherwise dull and empty lives.
However, I refrain from spreading the sexual ecstacy only I can provide to the women who lust after me- I refrain because of the commitment I have to my wife of over 20 years, the woman who has pledged her monogamy to me, and me to her- has carried us through, thick and thin, for our whole relationship.
If you hooked up with a woman you feel it's OK to cheat on, well-
I guess it sucks to be you, and it definately sucks to be her.