A better balanced and actually scientific take on the issue.
https://insidestory.org.au/the-fatherhood-myth/
I didn’t have any paternity tests but I looked at my kids feet for sure. My feet have predominantly longer middle toes than the big toe. My wife’ toes are descending in size from the big toe. The second thing I checked later on was there hereditary ability to roll their tongue like me. The wife cannot, but they can, like me.