Agreed, it's not that men *want* to be able to give birth, it's that it's a biological road block they think they can throw up for women to stumble over on the spiritual, sacramental path.  No connection, any more than a patronizing claim that "men can sire children, therefore they can't bake bread because obviously God doesn't intend them to bake bread, so get outta my kitchen" would be.  Some guys have no interest in the kitchen, but we've got plenty of male chefs who would protest vigorously (and plenty of back yard grillers).