In the online etymological dictionary I use I don't see anything about "what is relative to customs".
Here is what it says.

morality (n.)
late 14c., moralite, "moral qualities, virtuous conduct or thought," from Old French moralite (Modern French moralité) "moral (of a story); moral instruction; morals, moral character" (13c.) and directly from Late Latin moralitatem (nominative moralitas) "manner, character," from Latin moralis "of manners or morals; moral" (see moral (adj.)). Meaning "doctrine or system of ethical duties" is from mid-15c. Meaning "goodness, characteristic of being moral, virtuousness" is attested from 1590s.

I think maybe the words customs and manners are being umm... Synonymously used here. But, there are quite a few different meanings from around the world and not just one meaning.

In response to you saying morality is relative, um... To an extent I agree, but I think it's also subjective and universal as well. I believe it's all of those things.

What I do think is objective and universal is good, justice, and all other ideas of this genre that we classify generally as moral, but they are not, but rather they are virtues.

Could you expand on this a little bit? What about people who don't believe in good and justice? Also, how would you distinguish virtues from morals? I'm not trying to argue, I'm genuinely curious. :)

Ethics is on the other hand the science that is responsible for studying which parts of morality are linked to the universal idea of ​​good, and which others are simply adopted as correct because they are socially correct according to custom.

That's interesting cause when I read up on ethics I got the impression it was more of a "customs" sort of word than morality, though at this point I think the slang and blurring of things have pretty much turned the words into synonyms even if they technically do have some significant historical distinctions.

Thanks for thinking the reflection was interesting and for sharing some of your thoughts, I liked reading what you had to say and I learned a lil bit! Also, greetings to you as well. :)