The part that is most disturbing about this is the whole idea of "He wouldn't know." The fact that these girls would be able to just go home and pretend like nothing happens just shows how shallow they are as a human being. There is no denying that you have an emotional connection with a person when you stick your dick in them, so I don't know how you can just do that. Dat Oxytocin. Some are able to brush it off better than others I guess.
I just know that I would have a really hard time cheating on my girlfriend. I think that anyone that truly loves their significant other would, too. Everyone that I know that's cheated on their significant other that they actually liked regretted it hardcore. It's not about the sex. It's about the betrayal mayne. Can't trust dem hoes.