>>13404982Most people are some flavor of will-fuck-anything.
Traps are a great example currently, but look at human history. Nearly every society has same-sex fucking almost everywhere.
>>13404676The same reason there's people who have shit taste like foot fetishists. The vagaries of DNA and random mutation, + at least some social or psychological effect.
Also being the younger child in a row of children increases your chance because of hormone imbalances in women due to frequent birth
