Men in the mating condition … said they would spend more money on the conspicuous luxuries. … Women in the mating condition … said they would spend more time on conspicuous pro-social volunteering. … Mating-primed women … said they would spend more on generosity-signalling conspicuous spending; mating-primed men did the same. Also, mating-primed men … said they would do more heroic helping, but not more non-heroic helping. … Moreover, men who were most interested in promiscuous, short-term sexual liaisons showed the largest increase after the mating priming in both generosity-signalling conspicuous spending and in heroic benevolence. …
via Overcoming Bias : Naked Promiscuity.
Interesting. This paragraph caught my attention but the whole article is worth reading.