Does absolute morality require a supernatural explanation?

[Kantor]

Slimebeast said:
Of course it does. Absolute morals require a God. Only a God can make morals absolute.

Non-believers' morals are subjective and relative in that they're dependent on a bunch of ever-changing factors in the individual and in society.

Well, the morals of religious people change over time as well.

Consider the mainstream Christian positions on slavery, then civil rights, and most recently gay marriage/partnerships.