Gave myself a 1 .. never really had the opportunity nor the inclination to actually act, but I can't deny that women can be considered hot to both genders.
Also, part of it may be knowing what kind of affect a woman is having on a male partner, and starting to associate that aroused state in him with my own arousal, knowing that if he's aroused, and I'm close by....
. Possible theory.
Edit - took Medusa's quiz link and scored a 1.14.... looks like an accurate guess.