The Bachelor and the Bobby-Soxer, 1947 http://www.imdb.com/title/tt0039169/.
Dating a teenager is a particularly intoxicating opportunity for men who struggle with women their own age. The benefit of being an older man is.
A traumatized veteran, unafraid of violence, tracks down missing girls for a living. When a job spins out of control, Joe's nightmares overtake him as a conspiracy.