I would say 95%+ of millions of pregnancies each year is an even more staggering number to be a result of women allowing a guy to hit it raw and ejaculate inside her.
If you're engaging in an activity that has potential serious consequences / outcomes for you vs another person; who has most of the responsibility to take steps to avoid unwanted outcomes? It has nothing to do with math; it has everything to do with common sense.
Before birth control, women were more careful and selective about sex; now we have generations of women, many from fatherless households, with many forms of birth control, and options to murder their unborn, etc., so they've become less careful, less selective; leading to the rise in numbers of single mothers (I think in 2023, the USA black community, 72% of children are being born to single mothers; and hispanic and white aren't far behind) so the social stigma and financial challenges of being a single mother have lessened.
Again women control access to sex 95%+ of the time. The women have the risk of getting pregnant, not the man; so they have greater responsibility to ensure the outcome of intercourse is what they want. This has been true for millennia, only birth control and murder of unborn have given women options, and still the number of children born to single mothers is the majority of births in the USA.
Whatever the outcome, the women will have the primary responsibility to deal with it, not the man. Now, the law can be used to coerce a man to take responsibility, however paternity needs to be proven, and if the man has no resources not much can be done against him.
A common dual mating strategy is to cheat with the man she finds most attractive, and have the man with resources take care of her, and raise the other man's child without knowing it's not his biological child, which is roughly 10% of pregnancies, because paternity tests are not required/mandatory. This includes married couples. It's also why many women are opposed to mandatory paternity tests, because it would end this dual mating strategy option.
There are plenty of high profile stories of men who discover, much later in life after raising kids to adulthood, that those kids are not their biological offspring. I suspect the number is much higher than 10%, it's just most men don't believe the woman they love is capable of it, or it never crosses their mind, or they know it will create strife in the relationship, etc. Trust but verify.
