Small Fat - Tumblr Posts

I've seen a lot of discussion with fat people talking about things it's socially unacceptable for us to do (I feel weird calling myself fat cause I feel like I am appropriating the term while still being not that big, but I am not thin, I am technically obese [but I know bmi is bullshit], and I've heard "midsize" is disrespectful, so I think I quality as small fat). I've seen "we can't say we're hungry", "we can't eat fastfood in public or admit to eating fastfood", and the obvious ones about revealing clothing, but I keep thinking if it's just me or is it also "we are not allowed to sweat". If a skinny person sweats, there are marks on their shirts under their armpits, it's fine. If you can smell sweat from a skinny girl it's fine, it's hot outside or she wore a sweater when it was warmer than she thought... But I feel if I sweat it's immediately "of course, she's sweating cause she's fat". I feel incredibly insecure because I always sweat profusely. I have been late to class before because I forgot to put on deodorant and had to go back home or go and buy one before going to class. Maybe it's very specific because I really sweat a lot and I am not very sporty person so I get fatigued easily but I feel like paired with my weight it's different than on its own. Am I alone in this?