content: I posted a lot more information about the research this is based on in another submission here. The incredibly interesting thing is that it wasn't determining sexuality based on what you'd think of as sexual cues. It was determining it for men by examining mostly their nose, eyes, eyebrows, cheeks, hairline and chin. For women it was the the nose, mouth corners, hair and neckline that played key roles. This doesn't necessarily mean it's only looking at genetic factors. Your lifestyle and decisions are reflective in your physical appearance. For instance a very obvious thing is that an obese person is going to have less self control and a more self indulgent personality. Or a person with cauliflower ear is probably athletic and likely trained in some form of martial art. These are very simple first-degree factors, but ultimately there are countless things we do that affect our body in various ways and while humans may not be able to pick up on the more subtle of these signals (and they may be entirely nonsensical from our perspective) - AIs can pick up on them.