I've never worn spanks, or bodywear, or a girdle or anything. This isn't because I'm skinny, but because I'm a slave to comfort. Not even gonna wear heels at my wedding.
Does shapewear make you really hot and uncomfortable? What about if you were outside during the summer?
I know it smoothes out the flab and THAT part really appeals to me, but not if I'm super uncomfortable the whole time.