I think "lots" is vastly overstating it. Yes, there are women who would be ok with that, but in my experience they are greatly in the minority. Most women (and men to be fair) do not like if they don't have an exclusive claim on their spouse, even if it's being done in the open.
Take a lesson from tech: Three nines of uptime is quite sufficient to build something amazing and valuable to the right customers. We women (and anyone of any gender!) don’t have to implement Six Sigma to enter into a monogamous marriage marriage, but at least here in the U.S. we do care a great deal about proper outage notifications and root cause analyses and considering how to schedule and conduct future outages to minimize surprise harms. I would far rather target a couple of nines with a healthy process that doesn’t unduly harm the personnel involved than target six nines and live a dull life full of control-heavy, energy-draining grayness. Some people will just naturally hit 100% uptime without breaking a sweat; others will design and commit only to 99.0% but will do so with such grace and courtesy that an unexpected multi-month monogamy outage after years of impeccable courtesy and communication evokes compassion and patience and excitement for their return, rather than outrage and viciousness as defective coping mechanisms for their absence. (Come home soon, AO3.)
That’s just because you’re poor.
> Most women (and men to be fair) do not like if they don't have an exclusive claim on their spouse, even if it's being done in the open.
That’s because it is frowned upon to declare something like this publicly.