I don't believe in any objective morality, if, by "objective," you mean universal, timeless, and absolute. I do, however, realize the need for a "society" as such to accept what many of us could see as rational moral principles in order to function and cohere, thereby avoiding a state of radical amoral anarchy.
For instance, many of us accept as good the principle of respect for an individual's body - that is, his or her right to safety and health. However, a well-functioning society that still practices rule-based human sacrifice may see it differently. And, in this sense, human sacrifice could seem desirable, possibly even rational.
This is just one long way to say that I have no clue. All morality is socially-determined, so what the hell do I know.
I just subscribe to the moral law of volprof, which is respect other people's rights to their bodies, opinions, thoughts, and even their actions, as long as the latter does not somehow infringe upon other individuals' rights to the same. This is probably a gross oversimplification of the world, but, one could also argue what moral theory isn't.