im lucky because why lmao..



i always use banmal with my mom.

I haven't met anyone that uses "sir" to their father.

And I don't think it's wise to use "hey man" to your bose, even Hispanic people who work at McDonalds don't do that

반말 comes out naturally with your parents if you share a special bonds with them. It works more 친근감 expression way of conversating with. But using 반말 to total stranger who is older than you will result in smack talking or even worse. 존댓말 is such a wonderful words using it often will make yourself respected by others trust me.