Není to přímo vtip, my (soc. kognitivci, kulturní neurovědci a podobná svoloč) přemýšlíme nad podobnýma věcma neustále, ale ten obrázek mě rozsekal,)
"If this theory is correct, we should find a strong sexual asymetry regarding the use of trucks. And indeed, psychologists (see here for instance) have observed strong sex difference. It is actually one of the most robust human behavioral sex differences, with young boys using their toys to do physical activities (throwing them, pushing them, etc.) and girls using their toys to tell stories or do social activities. Recent studies suggest that this sex difference is even present among non human primates."
Zdroj a více na:
http://www.cognitionandculture.net/Nicolas-Blog/the-evolutionary-and-cognitive-basis-of-the-cultural-success-of-garbage-trucks-among-western-toddlers.html