Well, in the general population, we find differences between the typical male and typical female. For example, males seem to be more interested in systems and females seem to be more interested in people and particularly people's emotions.

If you have high-functioning autism, you may well have a lot of autistic traits but if you've got a particular lifestyle where it's possibly an advantage to be leading a solitary lifestyle and be quite obsessive, you're clearly able to function and maybe even make valuable contributions in your work, so arguably you don't need a diagnosis.

Everyone recognises that genes are part of the story but autism isn't 100% genetic. Even if you have identical twins who share all their genes, you can find that one has autism and one doesn't. That means that there must be some non-genetic factors.

Simon Baron-Cohen Quotes