"We tend to think of our looks as separate from who we are. But it turns out that physical traits like height or attractiveness may shape our personalities, behaviours, even politics."

A BBC article.

One study out of Germany’s University of Göttingen recently reported that of more than 200 men, those who were physically stronger and who had more “macho” bodies – including larger chests and biceps – also tended to be more extroverted, especially in the sense of being more assertive and physically active. The same strength-extroversion association was not found among the women in the study.

Other research has found that physically more formidable men also tend to be more prone to aggression and less neurotic (as in, less fearful and worrisome). Again, this makes sense if you see personality as an adaptive strategy. If you are physically weak, then being cautious and wary of danger is likely to lengthen your lifespan. But if you are physically formidable, you can afford to be more of a risk-taker....

We often think of our personalities and beliefs as reflecting the essence of who we are – whether shy or outgoing, commitment-phobic flirt or devoted partner, left-wing or right-wing. And we like to think that these traits derive from cerebral, moral or even spiritual sources. The idea that these aspects of ourselves might instead, at least in part, reflect a strategic adaptation to our physical size and appearance remains for now a controversial theory....