Dark Sun
Scavenger
Of course, that doesn't apply universally and the pink and blue thing actually began as a marketing ploy for baby products.
Few of us realize how all but thoroughly conditioned we are by the societies we live in.
Fair, but if you believe in the theory of evolution, to our understanding of how our ancient ancestors 10,000 years ago scraped out an existence in the frozen wastes of the last great ice age, women were the gatherers and caretakers, while the men hunted game, ranging from small rabbits to woolly mammoths. We have barely evolved in all that time, so to still see this in practice (in a more 'modern' equivalent) doesn't really surprise me. If this isn't biology and instead societal conditioning, then this play has been going on for a long, long, long time.
Edit: In any case, men are the primary demographic of 7D2D because it's a PC game (a market they dominate) and because it's a survival/violent game (a medium they dominate, as well). That's the brass tax of the situation.