Abortion is not murder. It is killing of a living being being, but it is not murder unless the fetus (and the host) is killed out of malice. If the fetus is not yet at a stage that it can possible live outside the womb, then it becomes intent to do bodily harm to the host.
Masturbation as murder? Sure, if you force someone to masturbate to their death, I suppose.
Cannibalism is not necessarily murder. It depends on the social culture involved.
Oh crap, forgot to don my unserious hat before entering the thread.