Career
He was an assistant to Alfred Kinsey on the Kinsey Reports and served as a co-author on Sexual Behavior in the Human Male and Sexual Behavior in the Human Female. Martin commenced study in economics at Indiana University in 1937. Soon after in December 1938 Martin actively sought out Kinsey and gave Kinsey his sexual history.
From spring 1939, he was assisting Kinsey with tabulation of his sexual history surveys.
In 1941 when funding for the project was received from the National Research Council, Martin became the first researcher hired by the project In 1960 he resigned from the Institute for Sex Research to pursue his doctoral degree, receiving his Doctor of Philosophy (in social relations) from Johns Hopkins University in 1966.
From 1966 until 1989, he conducted research, specializing in gerontology and sociology at the Francis Scott Key Medical Center in Baltimore, Maryland. He retired in 1989, and died on 5 December 2014, aged 96.
In May 1942, Martin married his girlfriend, Alice, in the garden of Kinseys" house.
Before marrying, he had sexual relationships with Alfred Kinsey. The 2004 biographical film Kinsey, written and directed by Bill Condon, stars Peter Sarsgaard as Martin.