Now this is a really obscure one, not much is available one. It is also a bit on the strange side. This is probably the only porn out there where the main soundtrack is by John Philip Sousa.
A young Marine in boot camp is being harassed by his Drill Instructor, so he decides to go AWOL and return home to the mother he loves. After deserting he is hitching a ride home when 2 young girls pick him up and show him what he had been missing while in training.
He finally makes it home, and his mother shows him exactly what he had been missing. To an insturmental track of "California Dreaming", she gives him a blowjob (including taking his load in her mouth) to show how happy she is that he is finally home.