Got banana?
We're primates and most primates are not monogamous. Most human males are lucky they get any females at all. In most primate groups, the Alpha males get all the females, and the other males are left with nothing but their right hands ( or left hands, as the case may be).
I was amused over the fuss about what Pres. Clinton did. He was just being a typical Alpha male. Ladies, having to put up with cheating is one price you may pay if you marry a rich or famous man, so think about it first.
In fact, the primate we are most closely related to is the Bonobo, which is very promiscuous, and they are into voyeurism too.
However, we are able to think and decide and create the life we want from the values we choose. It's called self-discipline, and M. Scott Peck once wrote that it equals happiness. I agree. IMO, If you look deeply and honestly at what areas of your life make you unhappy, you will almost always find a lack of self-discipline at the bottom of it. Sadly, most of my generation has failed your generation miserably by coping out on teaching you self-discipline and trying to be your friends instead. I think it is the biggest mistake my generation has made.
I have a good friend who has been married to her first lover for 39 years. She is faithful to him, and since he works about 100 hrs per week, I don't see how he would have time to cheat on her. She was also his first.
I have been faithful to my husband for 25 years and I am 99% sure he has been faithful too, but he is not a powerful Alpha. He's the typical super nice guy who charges too little for his work, does volunteer work, helps old ladies cross the street, etc. Definitely not Alpha, but I will gladly take that trade off. But, both of us had other partners before we met, so we don't qualify for your criteria.
I did not believe it was possible to be monogamous until I met someone who changed my mind when I was 23. I think many people never meet someone like that, so they settle, or remain single, or cheat. We are all living different lives.
I believe most birds are monogamous. I have no idea why. Any bird experts here? I'd love to know the answer.
klutzo