[retrac]

> I don’t feel a lot of guilt, and neither do they

I can tell you haven't tried to date such guys. They may not feel enough guilt to keep them from engaging in casual sex, but many of them absolutely feel guilt. Indeed, sometimes it's a complex of immovable guilt and shame, in the style of classic Freud, with the entire panoply of coping mechanisms deployed to deal with the dissonance (projection, affect isolation, displacement, dissociation, reaction formation, etc.)