I want to describe how I think of sexual identity and orientation. My thinking is simple and concisely expressed with a thought experiment.

The Nature article No ‘gay gene’: Massive study homes in on genetic basis of human sexuality describes the results of nearly half a million genomes revealed five DNA markers, none of which contributes more than 1% of predictability to orientation. Orientation is multifaceted and complex and very likely for identity, too. The multigene characteristic informs the thought experiment.