The two guys I knew that liked to see their women have sex with other dudes were both betas. They both said they felt empowered when they "allowed" their girl to have sex with another man.
Lol I think they were beta fools whom were clueless to the natural behavior of women. Both ended up divorced.
I believe that alpha-sigma-beta-omega behaviors operate on a continuum.
Men who exhibit more alpha male type traits are not going to allow their primary girlfriends to have sex with other men. I can't imagine this happening. If a woman is that important to you, her sexual exclusivity is important. No man who would be commonly associated with alpha-sigma type traits is going to feel empowered when his girlfriend is having sex with another man.
Most men are beta males. Beta male behavior falls on a continuum. It's possible to see men who are beta but not completely hopeless (some call this "Greater Beta") and then quite pathetic beta males. Men who allow their primary girlfriend to have sex with other men are betas.
@Howiestern -- It is my guess that the men you describe above were letting their so-called monogamous girlfriends to have sex with other men while they weren't banging other women. If that is the case, it is a beta male behavior.
Getting divorced is so common that this isn't a great indicator of alpha-beta. There are more alpha oriented men that get married and divorced, but it is less common than the beta male getting divorced simply because there are far more beta males out there.
How did their lives turn out? I'm really not wired for doing this with MY woman. If I had a whole bunch of girlfriends, I could see letting a couple of them have sex with other men, especially if i got paid for it.
What you describe (minus the pay part) is Caleb Jones/Blackdragon and his Alpha 2.0 lifestyle. Caleb Jones believes the model of monogamous girlfriends leading to monogamous marital relationships has failed. He believes the solution is polyamory/open relationships. In a polyamorous/open relationship system, you as the man are having multiple interactions with women. You are never having sex with one woman at a time. In these poly/open systems, the woman is free to have sex with other men too.
You can't be a cuck if you are in a poly/open system simply because a cuckold is defined as the husband/boyfriend of an unfaithful woman. A woman can't be unfaithful if there is no defined monogamous/sexual exclusivity thing. So while open relationship/swinger guys aren't technically cucks, their interactions with female in reality can often resemble being a cuck.
PUA Nick Krauser has published 2 hit pieces on Caleb Jones/Blackdragon. The first one was the main expose in 2019. The second one, in 2021, demonstrated that Caleb Jones' open relationship wife isn't good looking and well below how sexy he described her.
BlackDragon is a pathetic delusional cuck | Krauser PUA
Lol at Black Dragon | Krauser PUA
I believe that monogamous relationships have shortcoming but I don't think the poly/open/swinging lifestyle is going to be an effective solution for the majority of men. I don't think I could operate in a poly/open/swinging mode and so I have not pursued that path.
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In the last 20-25 years or so, more men have become "soft cucks" at the beginning of interactions. This is more true when men have used dating websites (late 1990s-early 2010s mainly) or swipe apps (early 2010s-present) to meet women. However, this trend dates back strongly to the Sexual Revolution of the 1960s/1970s.
In early stage interactions, man and woman meet somehow, go on some dates, and then end up having sex. A lot of the times, the sex is being had prior to exclusivity being determined. Without exclusivity in the early stage of an interaction, the woman is free to be having sex with other men. Since women on websites in the last 20-25 years have experienced immense demand for access to their vaginas, it's a common behavior for women to enjoy multiple penises while waiting for exclusivity.
Although there's no exclusivity at this point, if a man finds out a woman he's started seeing and sexing is having sex with other men, it doesn't feel good. It feels worse for the man if he's not having sex with other woman at that time.
Partial solutions to this problem would be to not have sex with women until both sides agree on exclusivity. This would slow down the time from meet to bang. If it makes the interaction better, slowing down that pace can be justified. Another solution is to meet women through real life means. You as a man meeting a woman through real life means doesn't stop her from using swipe apps or social media to meet men though it can increase the probability she values you more. The third partial solution to this is to accept that this "soft cuckery" is part of the reality of dating in the present times and to ignore it as best as you can. This is the solution that I think most men use.