Could an English native speaker help?

Are the following sentences correct? Which word to use?

Social norms/standards/etiquette dictates that you get married and then have children.
Socially accepted norms/standards/etiquette dictate that you get married and then have children.

Could you tell me how to naturally phrase 1,2,3 please?
Here are other social norms:

1 You offer an elder man/woman to be first at anything like standing in line, having your seat.
2 You treat managers, professors or anyone above higher than you with respect.
3 You wearing specific clothes for each occasion or timing, for not to "feel odd".
4 You avoid burping or farting in public.

Can you say that the above can be called social norms?

Could you tell me which word is correct and if this is natural?

We were brought up in the same country. We abide live by the same social standards/convention. You have more in common with me than someone who was raised in a different country. There is too big cultural gap between you two.

Can you say 'governed by different social standards/convention'?

They are governed by different social standards/convention.

It is convention/norm that you offer an elder man to be first at anything like standing in line, having your seat.
It is convention//norm that you dress in black for a funeral.

Is it correct to say: Which word is correct?

We live/abide by a code of conduct.

Thank you!!!