Let's notice how in the animal kingdom the male doesn't give a shit about the appearance of the female, the only think animal male cares about is that the female is adult and can carry and give birth to a healthy child, so if human males truly had animal biology they wouldn't lust over a child or a teenagers. But also they wouldn't care about the appearance of women, but in humanity it is the women who do the most about their appearances while men call everything related to skincare "gay".

Men wouldn't complain about paying child support while they don't get to see the child. Because animal biology is all about reproducing and securing that you genes life on, and child support makes it easier for the child to life a safe life which makes the possibility of the child spreading on their father genes high. But men basically think like "if I don't get to see the child, then I don't give a fuck about if it dies or lifes"

Men wouldn't be dead beat fathers. See also nummer 2. If they truly had animal biology they would stay and protect their genes instead.

Men love teenage girls the most. If you ask a men to choose between 15 year old or a 25 years old women the majority would go for the 15 years old. While they have bigger chance to "spread their seed" with the 25 years old and get a healthy child. Because 15 years old has bigger chance to die on childbirth and or give birth to a child with disabilities.

To sum it up. Men don't care about spreading their seed otherwise they wouldn't be sad having sex with a women they consider ugly, in this matter men are basically the females in humanity, they care more about the appearance of women than women care about the appearance of men. Men wouldn't lust after children and teenagers, basically pedophilia wouldn't exist if men truly had animal biology.