Is monogamy and being faithful a realistic option for men?

I have been divorced from my second husband now for a year and a half...and not because he cheated on me. Actually the problem was that the "fire" just gradually died, in terms of the physical nature of our relationship. I remember him as being very affectionate, always kissing me deeply, wanting to snuggle, going crazy over performing oral sex on me, etc. That spark began to fade after about 2 years of marriage (we were married 4 years, together 5 years). You know that "seven year ache", well I think it is more like the 3 to 5 year ache. This is the second time that this exact thing has happened to me. It happened with my first husband, and then with my second. Neither of them cheated on me...this I know with almost 100% certainty. Both divorces were very caring processes, and we talked about what went wrong about a year and a half after the divorce was final. The amazing thing is that both of these men has said the exact same thing happened to them.
You see, while we were married, as the fire died down, I started to ask them why they didnt like to kiss.....why things have changed in the bedroom, etc. They insisted they liked to kiss, and they loved to perform oral sex. But thier actions showed way different. They said that eventually they even began to think that what I was saying was true..they didnt like to kiss or perform oral sex.
Upon talking with each of them, I discovered something amazing. Both men said that once they started dating again, they couldnt seem to get enough of kissing, and giving oral sex..sometimes going so far as not needing thier own needs met..and only offering pleasure. They both told me that they were even dating two women at the same time, and that the women knew about it, and tolerated it...the men told me that they were able to do for both of thier girlfriends, what they couldnt do for me: endless kissing, oral sex, wanting to take them to fancy restaurants...basically being able to really worship these women, and keep the desire strong for them whenever they were together. The women apparently appreciated this fact, and understood that they were getting all of thier true needs met, so long as they were understanding of why the men were able to maintain this strong passion.
Key point: both of the men told me that they were dating the two women exclusively...WTH?....w hat they meant was that they werent cheating on these two women. These were the ONLY women in thier lives.....interesting.
I have come to the conclusion that men need to have more than one woman in thier lives, in order to satisfy that primal urge to spread thier seed...a topic that has been highly discussed. I think that it is absolutely true. Our civilization needs to get up to speed on this issue. Men and women need to discuss this issue as though it is real...not as though men just want a free pass to sleep around. That is not it at all. I think men and women need to decide to allow the man to have two women in his life at the same time, and make a committment to this...any additional women would be infidelity.
I am going to be open to discuss this with the next man that I decide to become serious with in the future. A mature man, that is evolving spiritually, that respects women and himself, will be able to have this discussion as an adult.