Does regular PMO (2 or more times a week) impact the health of the spine? Any thread which covers this?
Back in the late 19th century, the anti-masturbation crusaders said poor posture was a symptom of beating the meat. I think it was Kellog (yes, the guy who invented Corn Flakes) who said it.
No, masturbating can not cause spine pain. It may be only because of poor posture that strains your spine. If you feeling such pain, relieve this with a light stretch or put heating pad to soothe area. Or you can check with your personal doctor to get proper guidance and results.