File me under "the fat girl"

It happened again the other night. I was at a social function and the stick-woman standing next to me at the punchbowl looked over and said "Oh, hello, you're Beth, right?" To which I replied, "No, my name is not Beth, I'm ______." She looked confused and I could see her flipping through her mental filing cabinet--you know--through the file where she's dumped all the fat people with the post-it note "fattie" attached. Then she said "Oh, I could have sworn you were Beth."

Here's the thing: Beth and I look nothing alike save for one feature: we're both fat girls. But she has different hair length, texture and color, I am at least two inches taller than she, she has no sense of style, dresses like a garage sale refugee and wears glitter on her face and neck every day. (Were I 12 years old or otherwise totally devoid of even a hint of common fucking sense I might consider the glitter.) The outrage for me is that during my fat years, I have repeatedly been mistaken for other women who have absolutely nothing in common with me looks-wise other than fatness. I have been mistaken for women decades older and younger than I, blondes, brunettes, redheads, short, tall, it does not matter to some people. All that they see is a fat girl.