This is a beautiful and rare look at rural America in the 1960s. Dennis Hopper plays a schoolteacher with a gimpy leg who is quite unexceptional. He's middle-aged but still only engaged (to Amy Irving who is fantastic in this!)and still lives with his aged mother (the wonderful Julie Harris). Suddenly, a young, fresh, beautiful and vibrant teenager arrives at his school and he finds his heart - and other vital organs - stirred beyond endurance. She's technically not innocent (she's not a virgin) but she's no Lolita either. She's the epitome of the young women of Andrew Wyeth's paintings. In fact, the whole film looks and feels like a Wyeth painting: organic and idyllic with an emptiness that's filed with loneliness. The script is intelligent and original, allowing each character to be fully developed, and Dennis Hopper gives the performance of his career.
I've read a few reviews here and elsewhere that complain about Hopper's age and the frontal nudity. I belong to the school of thought that nothing natural is ugly, and that art should not ALWAYS be pure and youthful and beatific (which BTW, was what Hitler's vision was. Art that wasn't beautiful was classified as "degenerate" and banned). If there's room for artists like Michelangeo and Egon Schiele in this world, and there's surely room for Brad Pitt AND Dennis Hopper!
If the nude body is something that you just can't look at then a film like this may not be for you (there's only one very brief scene). But keep in mind that you can't broaden your vision of humanity if you don't have an open mind and are willing to look below the superficial surface that at least in Hollywood, poses as reality.