Did they really need a study to find that out?
It's genetically ingrained. Go with the male that protects offspring best, feeds you. All for the benefit of the survival of the species.
Now, now, don't be sad about it. Most of us would be single if women didn't make the transition during adulthood from looking for a lover to looking for a provider. It's all good. Nature has thought things out.
Besides: Good sex always has one providing meat to the other. Tomorrow is Good Friday and Edith will prepare a veggie dish. No meat then. She'll have to make good somehow ...