Kohei Yoshiyuki
In the 1970's a Japanese photographer Kohei Yoshiyuki did some documentary photography of people having sex in a public park in Tokyo. This series, "The Park", is available for the first time in the United States at the Yossi Milo Gallery in New York. As Philip Gefter points out in his feature for the NYTimes everyone is crossing a line: the couple, the peeping toms, photographer and us.