Is it true that there is no absolute morality?

[Aoi Magi]

Well a child's eye in martini doesn't taste that great, Lucifer is currently giving a discount on them over at hell's seventh circle (or amazon, if you prefer).

Aside from that, morality is a social construct, and though it is subjective, it is also a collective term as in society decides on it as a whole, enforces it as a whole, and tries to act on it as a whole.

It is not arbitrary because our social morality is guided by our collective instincts of survival. For example, killing a child would provide less meat compared to an adult, so it is a waste and not moral. Killing adults would ruin chances of procuring free dinners, or getting laid, so that's a bad idea too.

Similarly in religion, boiling a baby goat in its mother's milk would ruin both the meat and the milk, thus it is not moral. Working on the Sabbath means lower weed sales, which means loss of jobs, which in turn means more dead adults, so it is not moral.

Every moral law can be traced to collective survival instincts albeit defined and restricted by the knowledge and thoughts of the time they were made in.