I’ve never completely understood the disturbing reaction some people have to the existence of bisexuals. Why not believe they exist? Why can’t someone be interested in both sexes? Sure, I suspect some bisexuals might be 60-40 or 70-30, in terms of their same-sex vs opposite-sex attractions, and by the time you hit 70-30, I’m not entirely sure you’re bi rather than gay with some side interests. But why can’t some be 50-50?
Having said that, this study doesn’t seem to prove that 50-50 exists, just some less (more) than 100-0.