if you borrow money to your parents, do you pay back?

Philippines
August 6, 2009 2:59pm CST
I know I'm doing this. When I currently don't have money and I want to buy something, I borrow money to my dad or to my mom. Then I say that I will give it back to them when I already have my money. But I was wondering, its kinda weird to me, I'm still a student right now and don't have income on my own. When I have money, it obviously came from my parents. So it means that I'm paying back the money I borrow to them which also came from them. Weird right? Is that fair or what???