Surprise DNA Results Are Turning Customer-Service Reps into Therapists

So these societies have to make compromises.

> Evolutionary theory predicts that males will provide less parental investment for putative offspring who are unlikely to be their actual offspring. Crossculturally, paternity confidence (a mans assessment of the likelihood that he is the father of a putative child) is positively associated with mens involvement with children and with investment or inheritance from paternal kin. A survey of 67 studies reporting nonpaternity suggests that for men with high paternity confidence rates of nonpaternity are(excluding studies of unknown methodology) typically 1.9%, substantially less than the typical rates of 10% or higher cited by many researchers. Further crosscultural investigation of the relationship between paternity and paternity confidence is warranted.

https://www.journals.uchicago.edu/doi/abs/10.1086/504167

>The most thorough analyses are from Canada, where data in a national archive of all homicides known to police indicate that children under 5 years of age were beaten to death by their putative genetic fathers at a rate of 2.6 deaths per million child-years at risk (residing with their fathers), while the corresponding rate for stepfathers was over 120 times higher at 321.6 (Daly&Wilson, 2001).

That is a very large odds ratio.

I could adopt children. I could become a stepdad. I could never raise a child that was born through my partner cheating on me. It's basically a partner saying "I want your resources but I don't want my kids to be like you".

Not sure what this is talking about, but DNA Paternity tests are most certainly legal in Germany there is even a right to have one done: https://www.gesetze-im-internet.de/bgb/__1598a.html

edit: So I checked, what happened is that Germany banned genetic tests where there is no consent from the party a sample was taken from. In the case of a paternity test where the father, mother or child is unwilling, a court can instead force the test as knowing paternity has been decided to be a constitutional right.

However, if both parents had blue eyes, then it's near impossible for the kids to have brown eyes if they're genetically related to both parents.

    from random import random, randint
    p_blue = 0.5
    p_cheat = 0.1
    
    def randbool(p): return random() < p
    def randgenes(): return randbool(p_blue), randbool(p_blue)
    def mate(mother, father): return mother[randint(0,1)], father[randint(0,1)]
    def blueeyes(p): return p[0] and p[1]
    
    n_cheat = 0
    n_faithful = 0
    for i in range(0,1000000):
        mother = (True,False)
        grandfather = randgenes()
        grandmother = randgenes()
        husband = mate(grandfather, grandmother)
        lover = randgenes()
        cheated = randbool(p_cheat)
        if cheated:
            kid1 = mate(mother, lover)
            kid2 = mate(mother, lover)
        else:
            kid1 = mate(mother, husband)
            kid2 = mate(mother, husband)
    
        if blueeyes(grandmother) or blueeyes(grandfather) or blueeyes(husband) or not blueeyes(kid1) or not blueeyes(kid2): continue
    
        if cheated: n_cheat += 1
        else: n_faithful += 1
    
    print(n_cheat)
    print(n_faithful)

I think maybe it boils down to some people always wanting to know (me) and others who don't (whatever it is) - and you've probably self-selected when you clicked all the boxes as you spat into a tube.