Should sons also help out in the household if they're still living with their parents?

I'm 24 and doing my Master's while my younger brother is 20 years old. He hasn't enrolled in college yet and isn't even working.

He does absolutely nothing and yesterday I had an argument with my parents, after telling them that it's not my duty nor obligation waking him up for breakfast nor cleaning his room. We were upset that I've only made breakfast for myself, before stepping out to do several errands.

I find it unfair that he's not contributing to anything at all. If he's not even driving a car, working or studying, then helping out at home would be suitable. What bothers me is that if none of us are at home, he won't even make himself anything to eat. I don't think it's my parents obligation either. He's already a grown-up.

If I become a mother, I would treat both a son and daughter equally in regards to household chores and cooking. I feel both need to take care of themselves.

Updates
1 y
Another time, it was late at night. I was too tired from college and work and my brother woke up me expecting to get him something for dinner, I replied to him ''You have two hands and feet, make something yourself'' and went back to sleep.
Should sons also help out in the household if they're still living with their parents?
Post Opinion