I have always perceived morality as the calculation of the consequences of actions that lead to generational flourishing or demise. The things that are morally bad are things that will diminish future generations in their totality. Things that are morally good are things that allow flourishing of future generations.

In this framework stealing isn't bad because you're taking someone's stuff. It's bad because future generations will feel like no matter how many things they have or how hard they worked to get them, those things can be taken from them without repercussion. That persistent idea in a generation is more damaging than the material loss of the object. The reason why societies strive for justice is not that it feels good to punish bad people. It is the generational idea that when someone aggresses against you there is recourse and recompense. The idea of being helpless against those who wish to do you harm, does more damage than the individual harms themselves.

In this framework you can deduce that sexual deviancy is also immoral through the damage to future generations through sheer population reduction. It is not the acts themselves that create the harm. It is the idea that reproduction is something done for fun and has no intrinsic value to human flourishing.

I could go on and on but that framework I see as a good way for those who cannot or unwilling to communicate to a divine sense of morality to compile their morality from source code, essentially.