It seems I am allowed to see what you cannot see without registration. So the least I can do for you is to copy and paste the abstract so you get an idea what I was talking about:

Mating system and brain size in bats

Scott Pitnick, Kate E. Jones, Gerald S. Wilkinson

Abstract:

The contribution of sexual selection to brain evolution has been little investigated. Through comparative analyses of bats, we show that multiple mating by males, in the absence of multiple mating by females, has no evolutionary impact on relative brain dimension. In contrast, bat species with promiscuous females have relatively smaller brains than do species with females exhibiting mate fidelity. This pattern may be a consequence of the demonstrated negative evolutionary relationship between investment in testes and investment in brains, both metabolically expensive tissues. These results have implications for understanding the correlated evolution of brains, behaviour and extravagant sexually selected traits.

(italics are mine)

So we now know that the females of our species when saying No to too early advances only want us to get a bit smarter, don't we?
Or do we know that only the smart men know how to deal with an initial No?

Wolfgang