Wolfgang, as far as I understand the excerpt you provided there is no connection between brain and ball size with male bats.

It does say that female bats with small brains are more promiscous than female bats with bigger brains.

Could it be that small-brained bats are promiscous because they are not able to recognize partners (bats live in large groups and don`t look that different from one another after all - especially in the dark)?

Does the article say anything about the colour of the small-brained female bats fur?

And does anybody know how promiscous BATWOMAN is and what that means regarding BATMAN?????????

;0)
Ernest