I've wondered about this for some time, and never asked anyone about it because it seems embarrassing! I even feel a bit self-conscious asking here
Sometimes when I sit on plastic-type chairs (not white), after I get up, there is a streak (of what I can only assume to be sweat) right where I was sitting. I've observed other people getting up, and I don't think I've seen it on anyone else's chair. Does this happen often, is it related to being obese/overweight? And it's not like I sweat a lot either, probably just like the average person.
Please tell me this happens to a lot of people who need to lose weight and it's not an aberration of sorts
because I want it to be gone as the extra weight goes!

So if other people's were as noticeable, you'd be able to see them from any angle. 


