The Oxygen Network runs softcore pornography late at night. I was channel surfing last night and stopped when I saw nipples. I thought I was watching skinemax until I saw the "Oh!" logo in the corner of the screen.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.