Thin privilege is when you need to book a flight and you don’t have to take every precaution possible to make sure you get the most space. Thin privilege is not having to worry that an employee of the airline won’t deem you “too fat” and force you to pay double the price for your ticket. Thin privilege isn’t having to take a different flight than your roommate because she decided to fly Southwest (which - if you check their website - has a huge page about why forcing their overweight passengers to pay for two seats “isn’t discrimination”).