Pre-reflexively, I find myself of the intuition that many matters in life simply fall outside the scope of moral concern, even if we can subject them to moral reasoning. For example, there doesn't seem to be any moral question to be had about the simple act of buying a cup of coffee in the morning, even if that money spent could've been donated to charity instead. On reflection of the particulars, some moral considerations might come to bear on that purchase or on a habit of purchases, but, ceteris paribus, morality just doesn't seem to bear on the mere act of buying coffee. Even describing the act as "morally permissible" sounds a little strange, as if permission were needed in the first place. Moral reasoning seems simply out of place here.
My sense is that while some normative ethical theories (e.g., Kantianism) are relatively hospitable to this intuition, utilitarianism cannot be, at least in its traditional forms. After all, the utilitarian calculus can easily be applied to just about any human...