How come you only buy her something and not me? Is it because she is smaller or what?

One day me and my brother were going to the store with my dad we got to the store the store was called chavez supermarket in redwood city we got to the store and me and brother got a bag of chips my dad was going to get meat for my sister's birthday party when it was time to pay we both put the bag of chips my dad said “wait a minute I can only buy your sister's bag of chips” my brother shut the doors car hard almost causing an earthquake” my dad got me the bag of chips once we got to the car my brother said “how come you only buy her something and not me is it because she is smaller or what” my dad didn't answer him he just stayed quiet.

The lesson I learned was that girls get more stuff than boys do. And in school it's the same thing because girls get more stuff than boys.