My 95 year old grandma keeps a closet full of toilet paper. During the Great Depression that stuff was really hard to get and she still has a fear of running out of it so she's always kept a stockpile even to this day. I've seen this type of behavior in people in my line of work. One who grew up living under a bridge not knowing where their next meal would come from. Now this person is an adult, has a home and a job and is also morbidly obese. They gorge uncontrollably. Another who cannot throw away any food even if it's rotten. If we take their spoiled food and throw it in the dumpster out back, they'll dig it back out after we leave. Even though they have plenty of fresh food in their fridge. It's just a permanent fear ingrained into them.