小橋 昭彦 2008年4月5日
Male monkeys prefer boys’ toys – life – 04 April 2008 – New Scientist
It’s thought of as a sexual stereotype: boys tend to play with toy cars and diggers, while girls like dolls. But male monkeys, suggests research, are no different.

っていうことはつまり、男の向けおもちゃとか女の子向けおもちゃというのは、文化的なすりこみじゃなく、生物学的な違いに基づくのかもしれないと。

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