Absentminded Behavior
Friend of mine will absentmindedly start putting more and more of her shirt into her mouth until she chokes/gags. She enjoys the feeling and does it while doing things like browsing reddit or sitting on the toilet for a long time.
A lot of people seem to think this is a “chewing” issue. I assure you, it’s a gagging thing. Was kind of odd the first time I saw her do it so casually and she thought I was weird for not liking the feeling of almost puking.
Story credit: Reddit / AnxietyExit