
Approximately 70% of Pinterest users are female, according to marketing specialist Jay Ehret. Why does the site skew so heavily female? It has to do with the difference in male and female brain chemistry. E-commerce consultant Zoovy explains that males get a hit of happiness-inducing dopamine to the brain upon the completion of a task whereas females get a continuous stream of dopamine throughout the task.
In other terms, males are neurologically rewarded for hunting while females are neurologically rewarded for gathering. As a social pinboard site, Pinterest is the perfect platform for gatherers. Furthermore, there’s no "end" to Pinterest — no way to win or beat it as if it were a game. You simply keep pinning, so females are more inclined to stay active.
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This article was first posted on BI

But there is no winning or contest on Facebook or Twitter or Flickr or most of the social networks, and yet they have more male members there. This seems like dubious theory to me.
Because there are more pictures rather than text on pinterest, most females attracted to pictures of shoes and clothing that being the top content being shared, the research states that why women lead pinterest.