Ken is totally blind, but something very strange happens when he reaches puberty: He starts seeing sex organs. Red is for male, green for female. Then he finds that the new girl Lisa at the blind school has the same kind of vision. They are drawn to each other, and drawn to sexual exploration as they are exposed before each other. They see things both wonderful and not so wonderful that are hidden from the sighted.
This is what I did on my summer vacation. I went down the shore with my Mom and her boyfriend, and when I spied on them doing it, it awakened feelings I never knew I had. And, you know, what happens at the shore stays at the shore.