Not sure if this will make a ton of sense but, here it goes!
Ballet Girls: Highest compliment that can be given to you: "You have nice feet."
Normal Girls: "You look so pretty." (Or something along those lines)
Ballet Girls: Untwist your straps on your leotard, even if they just meet you last week (true story)
Normal Girls: Only tell their best friend if their bra strap is showing.
Ballet Girls: Ask for food and then after the first helping, they help themselves to seconds and thirds.
Normal Girls: Hesitate to ask for food and then when they do ask they don't usually ask for seconds.(the exception to this is best friends)
Ballet Girls: Disappear from society for hours every week because of ballet.
Normal Girls: Wonder where their ballet friends went.