You are misconstruing my statement.spuriousmonkey said:No, that is why we (biologists) specialize in animals. What is valid for the mouse isn't necessarily valid for the elephant, or for humans.
It's not that she found heterosexuality in mammals and then she planted it on the humans!
In fact she didn't find heterosexuality in mammals, but assumed that the heterosexuality in humans is 'natural'. What I'm saying is that since she is not a social scientist who has worked in the area of human gender and sexuality her remarks about this should be taken only as her personal opinion.
When you find something which is so common and universal in other animals, then if you're saying it is not so in humans, the onus of proving it goes on you --- especially when it can be proven that other societies at different places and times were very close to that 'something' found commonly among animals.