@Thelnebriati
I think it just shows that we see 'sex' as a fundamental category, and our pattern recognition is hard wired to spot sex based characteristics.
If that wasn't the case I doubt we'd be a sexually dimorphic species!
That's an interesting point, I'd not considered that yet.
I was thinking about this yesterday. Most famous women don't have particularly strong facial features. Partly because women tend to have finer and small facial features anyway, but add to that the attractiveness of a woman is often tied into having small, delicate facial features, and famous women are far more likely to be required to be physically attractive than famous men.
For eg, Taylor Swift. Incredibly famous woman. But does she have particularly defining facial features? She has a signature red lipstick thing going on but that's it, and that's not her face. So you're not going to be able to "see her face" in a pepper or a carrot or whatever, because her face isn't very remarkable.
Women with remarkable faces don't get famous. No female politician could get away with looking like Nixon. They'd never be taken seriously enough to get going.
Then you can add in the whole issue of the cost of a false positive Vs false negative in evolutionary terms. This is one explanation for why we are wired to see/hear things that aren't there - a shadow that looks like a monster, creaky floors that we think are footsteps, etc. If it's a false positive, the cost is zero. We thought we saw a danger, we got scared, it turned out to be nothing, nevermind, you're still alive. False negative the cost can be total - didn't recognise the danger, you've been eaten by a lion, no kids for you. Seeing faces in things can be seen as an example of a false positive. Is there an argument that we have evolved to see male faces as a defence mechanism? As males are more likely to be a threat?