Today's candidate for the "well, duh" research file:
Ask a straight man, “How do you like your women?” and it’s unlikely he’ll answer, “Dumb and sleepy.” But according to new findings, these characteristics—and any other traits suggesting that the lady isn’t particularly alert—are precisely what the human male has evolved to look for in a one-night-stand.
[. . .]
The main finding to emerge from this follow-up study was that the more promiscuity-minded men who happened also to have deficiencies in personal empathy and warmth were the ones most vigilant and responsive to female “exploitability” cues.
Promiscuous men seek out dumb women to exploit for one-night stands? Say it ain't so!