Before commenting the instinctive "the title is a contradiction, this doesn't make sense", please read the damn abstract. It is short. If you are too lazy, here

Before commenting the instinctive "the title is a contradiction, this doesn't make sense", please read the damn abstract. It is short. If you are too lazy, here is the first line: "Individuals who identify as heterosexual but engage in same-sex sexual behavior fascinate both researchers and the media. " The whole point is about examining current categories, perhaps come up with more fine-grained categories, and finally, understanding human behaviour better.