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My original tumblr post was here. This image is the VHS cover of a movie Sex Machine, also known as Love and Energy. The IMDB entry for the movie provides the following plot synopsis:
In the future, the world’s oil supply has finally been exhausted, causing a massive enery crisis. In a search for alternative sources of energy, a scientist invents a machine that can harness the energy expended during sexual intercourse and transfer it into electrical power. Written by frankfob2@yahoo.com.
The image was first posted on Tumblr by vhscoverjunkie and comes to us via corporalsteiner.