Most Helpful Guy
If you want my honest opinion I think it has to do with the culture that many have grown up with. I don't mean to sound like an old man, I enjoy womanizing rap music as much or more than the next guy but I really think it plays a role.
For example at any time you can turn on MTV and you'll see shows like "Teenage Mom" or some kind of "Real World Reality" show. These shows all show hooking up, cheating and other scandalous behavior as if it is normal or even something to strive for. All these beautiful people getting drunk, hooking up and then either moving on or picking up the phone to tell their distraught partner what happened the night before. I believe my society has grown up watching this shit and believe it's normal.
Same with the music. I mean you got songs about ****ing in the club, nobody has to know, keep it on the low, etc. Half the time you may not understand the lyrics but when you hear the songs 300+ times over their course I believe it makes its way into your subconscious. Everybody's doing it. He'll never find out. If he does than it's on to the next one. Whatever becomes an attitude many guys and girls my age both have.
I believe that's part of the reason it's very hard these days to find and have a truly trusting and loving relationship these days. Probably also has to do with why so many become divorced. Relationships are advertised as having a shelf life by the media and not as something to be treasured or nurtured but something that can be easily disposed of and replaced whenever it feels right.
It sucks but it's probably not going to get any better.