These are just cracking me up!
I had a co-worker like her once on a 4 month temp job I took. I can't remember most of the "helen-isms" (as we called them), but one that stands out happened when we were talking about buying shoes. I have very small feet for an adult (size 4.5 to 5.5 depending on the style of shoe), so I mentioned that I often try kids shoes because I can wear some kid sizes. Well Helen just didn't get how that could possibly work. How could someone wear women's shoe size and still wear kids sizes? I explained that there's some overlap, and some places won't carry my shoe size in women's, but they will have kids shoes that are my size. This confused her even more, and she insisted that since I am an adult, I should just wear adult shoes, and not kid shoes, and it didn't make sense that I would even look in kids shoes because it isn't the same size at all.
Other coworkers were trying to help her grasp it, but she just got angry with us for "making fun of her" by insisting that I wore kids shoes. In her mind, once you were a certain age, your feet would be a certain size and then you just wore adult shoes. She could not believe that I could fit into kids shoes of any size because I am not a kid!
The funniest thing was the next day she brought in some of her shoes that were too small for her, and insisted that they would fit me because they were "small". Well, she wore a size 9 and these shoes that were too small for her were size 7.5 or 8, and were huge on me. I politely pointed out that they were too big for my feet, and she was angry that I said they wouldn't fit. I even took off one of my shoes and held it up to one of the "small" shoes to show her the size difference, and she told me that it was time I grew up and wore adult shoes!
From that day on she would get so mad if anyone even dared to mention shopping for shoes again, but she would still bring in "small" women's shoes and insist that they must fit my feet.