Probably the most widely cited part of the Kinsey Reports regard the prevalence of different sexual orientations — especially to support a claim that 10% of the population is gay.
In fact, the findings are not so straightforward, and Kinsey himself avoided and disapproved of using terms like homosexual or heterosexual to describe individuals, asserting that sexuality is prone to change over time, and that sexual behavior can be understood both as physical contact as well as purely psychological phenomena (desire, sexual attraction, fantasy).
Instead of three categories (heterosexual, bisexual and homosexual), a seven-category system was used. The Kinsey scale ranked sexual behavior from 0 to 6, with 0 being completely heterosexual and 6 completely homosexual. A 1 was considered to be strictly heterosexual, a 2 mostly heterosexual and more than incidentally homosexual, a 3 equally homosexual and heterosexual, and so on. An additional category X was created for those who experienced no sexual desire.
The reports also state that nearly 46% of the male subjects had "reacted" sexually to persons of both sexes in the course of their adult lives, and 37% had at least one homosexual experience.
11.6% of white males (ages 20-35) were given a rating of 3 (about equal heterosexual and homosexual experience/response) throughout their adult lives. The study also reported that 10% of American males surveyed were "more or less exclusively homosexual for at least three years between the ages of 16 and 55" (in the 5 to 6 range).
WIKI
-------------------------
That was Alfred Kinsey, around 1950.
Good Night and Good Luck!