Can masturbation force a period to come sooner than the due date? can it also force a period to come off faster?

Not that I've heard: I haven't ever heard that masturbation can cause a period to come sooner or cause faster completion. There are uterine contractions with an orgasm, and i would suppose it's theoretically possible that these contractions could cause the blood from a uterine lining that was already going to be expelled to come out sooner.... Though i've never read anything to this effect.