But without a belief in a higher power to hold you responsible in the next life, all things are morally equal. Any other system of morals is just for the convenience of society, or the individual, and has no authority whatsoever. This life is then all we've got, so we must maximize our own personal pleasure, whatever the expense to society or other people. If it feels good, it's moral "How can it be wrong, when it feels so right?" On the other hand, why bother with pleasure, or anything else. In a hundred years it won't matter to you. Might as well blow your brains out and get it over with. And a lot of people do. Not the way I want to live or believe.
But without a belief in a higher power to hold you responsible in the next life, all things are morally equal.