Can you quote any Catholic sources for this?

Of course there is not a Catholic source.  The science is new.  The science came after Vatican 2.  There hasn't been theologians discussing the matter.

For those who like research. (I did not read the whole thing)

https://pmc.ncbi.nlm.nih.gov/articles/PMC10295201/

Pair bonding is not Catholic.  It's a construct based on evolutional psychology.  Unmarried people can pair bond according to this theory. 

Matrimony is Catholic.  It's the only bond that matters.

Pair bonding is a chemical connection that occurs. It's a real thing due to the biology that God made. It has nothing to do with evolution which is a heresy. Matrimony is a spiritual bond, but the body also has physical bonds which are important as a person is both body and soul.

Marriage honourable in all, and the bed undefiled. For fornicators and adulterers God will judge. Hebrews 13:4

The immoral are only lucky it doesn't carry the death penalty like it used to. And Jesus Christ said "Go and sin NO MORE" to the woman caught in adultery ( John 8:11).

Jesus Christ was more than familiar with the rope ...

But he that shall scandalize one of these little ones that believe in me, it were better for him that a millstone should be hanged about his neck, and that he should be drowned in the depth of the sea. (Matthew 18:6)

On the contrary it still has the death penalty of the soul, and in most cases it's the child that get the death penalty if you know what I mean. If woman couldn't murder their children fornication would be much less.

Why do you keep going on and on when this has already been discussed?This is true, even though it takes 2 to do both it's no difficulty for a woman fornicate, she can literally order any man on delivery through an app. But this is not the case for marriage for men. And fornication will depend on his looks.

I've been wondering the same thing. Maybe she's projecting her own issues. It's such a weird thing to be this obsessed on this topic unless maybe you're unmarried and you want to find a spouse, i don't know. 

 Guess what? The average woman today has way more partners than the average man. 

I don’t think so. 

Women will be more selective with who they fornicate with (guy has money, status, or looks) but men could literally do it to anything (I'm not saying they do) because of their high sex drive.

And the woman choose the best they can get which makes them have unrealistic expectations. None of these attractive men will commit, because they have options. It takes no effort for a woman to have insecure legs. It is said that the man does the woman and not vice versa putting it mildly.

I don’t think so.

It's literally true. Most guys have little to no experience with the ladies. While a majority of girls riding the chad carousel due to dating apps. Like the other poster said, me will sleep with almost anyone while woman are picky. The woman will still sleep with the attractive men while the average/unattractive guys are invisible.

That's why we see data that claims most men are single while most woman are not.

And the woman choose the best they can get which makes them have unrealistic expectations. None of these attractive men will commit, because they have options. It takes no effort for a woman to have insecure legs. It is said that the man does the woman and not vice versa putting it mildly.
It's literally true. Most guys have little to no experience with the ladies. While a majority of girls riding the chad carousel due to dating apps. Like the other poster said, me will sleep with almost anyone while woman are picky. The woman will still sleep with the attractive men while the average/unattractive guys are invisible.

That's why we see data that claims most men are single while most woman are not.

You're right. It's counter-intuitive, because superficially, your first thought is, "It takes two to tango". But the male tango partners are the top 5%, whereas many guys are left out altogether. So yes, each "notch on the woman's bed post" represents a male fornication as well -- but it's all the same men!

Also, "averages" are deceptive because Chad skews the numbers.