Furthermore, claiming that pregnancies cannot occur without an ejaculation is not assessing blame or responsibility (whatever you mean by that), but stating the obvious for almost every pregnancy*** in the world Why some men posters are unable to grasp such a simple and liberating idea is truly fascinating. For some obscure reason, they feel that "men" are under some attack.
The reality is that pregnant women are the only ones who bear the physical responsibility for carrying an embryo to its ultimate end (termination or birth). They are only ones with that responsibility. They are the only ones who should be able to decide what to do with their bodies and the attendant physical and health risks, let alone the emotional ones as well. Yet in this world (and, indeed, this forum), there are men who feel they have the right to deny women the choices they need in order to cope and survive a pregnancy.