Eberhard and Phyllis Kronhausen

Phyllis (1929 - 2012) and Eberhard Kronhausen (1915 - 2009) were a husband-and-wife team of American sexologists, mainly active in the 1960s and 1970s. They wrote a number of books on sexuality and eroticism, and they also amassed a collection of erotic art, which traveled around Europe in 1968 as the "First International Exhibition of Erotic Art" and then found a home in San Francisco as the Museum of Erotic Art (1970-1973). Provided by Wikipedia