I`m sorry Machiavelli but I`ve known far too many women to believe this is true.They so prefer an emotional connection. But if alpha/sigma is available for sex without love, they'll settle for just the sex if it's the right time of the month, or they're pissed off at hubby, etc. As Roissy said, "For most women, five minutes of Alpha is worth five years of Beta."
Notice the "most" bit, above. NAWALT, or so they say.