Yours reminded me of some coworkers who used to eat at their desks. One was pregnant and would get a large drink with ice in it and crunch on the ice. She sat so close to me I could have reached out and touched her. She would be crunching ice all day long and I really couldn't say anything about it because she said her stomach hurt and the ice helped soothe the soreness. It probably had more to do with hormones than actual stomach pain.
An other one used to like to eat really crunchy stuff at his desk, chips, nuts you name it, but then he went on a wasabi pea bender for about 6 months. Every day, snacking on wasabi peas. It was enough to drive you nuts. But what was really bad about him is that after eating all those salty snacks, he had to have something to wash it down with, and you could actually hear him gulping down sodas. Every swallow.
Another older guy (in his 50s) who was as skinny as a rail would eat enough for three people at his desk and this was just his snacks. He would get bags of chocolate -- stars, kisses, those little square, wrapped chocolates -- and eat the whole bag at his desk. He also ate Little Debbie Snack Cakes at his desk, whole boxes of them, in addition to the chocolate. His bottom desk drawer (the big one) was full of boxes of Little Debbie Snack Cakes of various types and bags of chocolate. He never gained an ounce. This guy in his mid-50s had some York peppermint patties one day and went into a York peppermint patty commercial. He jumped, flat-footed, no running start, from the floor to the top of his desk and started acting like he was surfing, while he shouted out the York peppermint patty commercial right in the middle of work. He not only ate a lot at his desk, but he brought his lunch to work, which consisted of THREE sandwiches and assorted other food. He died shortly after that after his third heart attack. His outrageous metabolism and his unhealthy diet probably had a lot to do with it.
Another coworker had some strange eating habits. One day, he brought a whole bag of corn chips (the big bag), a big jar of salsa, and a whole bag of cheese. He'd sit there in the lunch room, eat the chips, DRINK the salsa right out of the jar, and eat the shredded cheese right out of the bag, crumbs getting all over him. He was an overweight slob. When one of the coworkers called him on what he was doing, he said in all seriousness, that he was on a diet and was eating light that day. He finished off the whole bag of chips, the whole bag of cheese and drank all the salsa, upending the nearly empty bags over his mouth and disgusting everyone as crumbs flew everywhere.