We even have a new invention that all the females are bisexual. Should be nominated for Nobel price, for sure.
I think he's talking about XY women. There are some tiny share of XY women exist, 1 per 80000. This happens due to genetic anomaly but having XY genome doesn't make them bisexual.
That was a mistake, I meant XX women. All the women in these studies were biological women(XX) like your sister, wife, mother, daughter, etc, and all of the so called "straight" women were greatly sexually aroused by pictures and videos of other women, not men.
In fact, it's believed the Y genome could have a small part in fixitating sexuality, which would explain why males are "categorically" strict in their sexual attractions(Straight men are only sexualy attracted to women, gay men only to men). Biological women do not possess the Y chromosone however.
And for skeptics, it has nothing to do with cultural factors. In these studies, gay men were only sexually attracted to other men, ruling out the possiblity that "excessive" sexual female innuedos shown in the media play a role in sexuality,
it is all biological. It's also why I'm infuriated with religious folk. In fact, my muslim friend(female) growing up came out to me a few years ago as being bisexual, but was afraid to ackowledge that part of herself because of her religion(She is no longer in Islam).
in the free ones, bussiness is made by mutual agreement of both parties. 
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