Def the kind of thing that's cute in a toddler but not in a ten year old. Assuming she had been doing it from toddlerhood, he could have sat down and said, "Look, that was OK when you were little but you're a big girl now."
It can work the other way. When my sons were like 6 and 8, I loved to take them for pizza because they only wanted to eat the crust. I'd get one complete slice plus the cheese and tomato sauce from two.