Don’t pick a fight with someone who has ears, fingers orfeet of different sizes or shapes, because they’re morelikely to react aggressively. Scientists think that earlystress in the womb from things such as a mother’s smoking ordrinking can cause these small physical imperfections andalso poor impulse control.
Researcher Zeynep Benderlioglu says, “Stressors duringpregnancy may lead to asymmetrical body parts. The samestressors will also affect development of the centralnervous system, which involves impulse control andaggression. So while asymmetry doesn’t cause aggression,they both seem to be correlated to similar factors duringpregnancy.”