I'm going to eat mac and cheese
Is it your favorite meal?
No, but I will prefer it to fruits and vegetables because eating mac and cheese gives me more pleasure.
I love me some mac and cheese, too! Be careful not to eat too much junk food though.
What I do in my own body is none of your business.
Agree, it's not my business, but if I see a friend harming themselves, I feel obligated to point that out. I'm not telling you what to do, I'm expressing concern because I care about you.