The above photo, at first, brought to mind a scene from a grade-b horror film when I saw it in a magazine. When I read about it, I was even more intrigued.
The untitled photo is by Japanese photographer, Kohei Yoshiyuki, and is from a series of pictures he took in the very early 70's in parks around and in Tokyo. His subjects were men and women (both gay and straight) cruising public parks for sex. If you click on the link at Mr. Yoshiyuki's name, you can see more of these stark, eerie pictures (that to me at least, are not the least bit sexual) - and also read an interview on how he took these pictures with an infrared lens, and how he would run off after taking the shots so that his subjects could not see him.