Kinsey was a guy, who came up with a scale to determine your level of besexuality. Google Image Result for http://www.kinseyinstitute.org/research/images/ak-hhscale2_clip_image001.jpg
The Kinsey scale is a measure from 1 to 6 that people use to describe their sexual orientation. A "1" represents exclusively heterosexual, while a "6" represents exclusively homosexual. Some people like to use it because they don't like the labels gay/bi/whatever, but like to describe their orientation that way.
Oh, my gosh. Thank you guys so much! now I know that I'm kinsey 5 and not just a three or something. I always knew I liked guys more, but now I can be specific when people ask me!