Contributed by Troy Shirangi
- Jan 2, 2018
Sexual orientation and the rewarding brain
When Michael Stipe of the alternative band R.E.M. wrote, ‘sexuality isn’t just black and white, or simple—it is every shade and gradation of the rainbow,’ he very well could have been writing about the animal kingdom at large. Sexual orientation is remarkably fluid—not just in humans, but in all kinds of animals [1]. Female bonobos, for instance, will lie on top of one another rubbing genitalia. Male Adelie penguins from Antarctica routinely take turns copulating with each ot