Kinsey was a zoologist. In 1948 and 1953, he released two volumes about human sexual behavior.
Kinsey was a hit in pop culture. Cole Porter immortalized the report with the stanza: "According to the Kinsey report/ev'ry average man you know/much prefers to play his favorite sport/when the temperature is low/but when the thermometer goes way up/and the weather is sizzling hot/Mister Adam for his madam is not/cause it's too too/it's too darn hot, it's too darn hot/It's too too too too darn hot". The term Kinsey Six came to be a nickname in gay circles for people with no heterosexual experiences (or even fantasies) whatsoever, after Kinsey's seven-point scale. (It starts at zero.)
Suffice it to say, because Kinsey's reports discussed homosexuality and masturbation, McCarthy accused him of being a communist, and the ministers of the time said it was proof of the decay of morality in America or whatever.
In more recent years, there's been a fundamentalist assault on Kinsey's credibility. Mostly they focus on one table, regarding orgasm in prepubescent boys. Kinsey garnered the table from the journal of a pedophile who began before World War I. Reisman, de Mause, Dobson, and their ilk assume Kinsey did the experiment himself; the latter would've been more scientific, but less ethical.