There is an unlimited number of things that can make a person feel awkward just thinking about them.
Here is some:
The feeling after you sit in a hammock or jump on a trampoline for a while and then you go to bed and still feels like you are rocking.
Political Discussions with people with strong feelings that oppose your own.
Sweat dripping down your back.
Sitting for a while when it is hot and you know that your ass is sweating but what you don't know is if it has gone through your pants and made it look like you peed. You didn't pee, but the sweat might make someone think you did. How are you supposed to explain that to everyone? And what if you don't have a sweater or plaid shirt that you can cover it up with? What if your shorts or pants are a light colour. What if the dampness of the shorts makes them get caught in your butt crack when you stand up and then you look like the girl who peed herself and then sucked her shorts up her butt?