I always think this is the unfortunate flip side of the choice to have a child laying solely with women.
Yeah yeah, two to conceive etc but let's not pretend the man has any choice at all over whether the conception turns into a child to raise for the rest of his life. Our body, our choice, abso-bloody-lutely. But people miss off the last step of that. Our consequences.
So many men agree to children not because they desperately want them, but because it "keeps the wife happy" and then parent alongside the wife who's doting on her very very much wanted child. Not to say men are some feckless passenger, but so many aren't actually that arsed about kids and just end up with one or two because "it's what you do, and it stops her from going on about it"
In the same breath, that man could potentially be devastated and could do nothing about a conception being terminated. The control is all with the woman, but equally she needs to accept that she's making the sole decision for a dependent child for the next 18yrs as a minimum.
Men have to pay maintenance, of course. But just like a woman can choose the child never to exist, men can decide they don't want to be a parent too. Unfortunately for the existing child, men can only "opt out" post event so to speak. Most know they wouldn't have a marriage if they refused children, but if the marriage is over, there's no reason to keep parenting children they only had to keep their wife happy.
Not all men, sure. But far far more than people are comfortable to admit. This is why all the "how could he" comes about. Because the woman can only see it from her point of view, the view that desperately wanted the child and can't imagine life without them. When the view is, "she wanted a child, I gave her a child, but actually I wasn't that bothered either way" then sadly for the children, they won't see much of dad.