They're made up of the tiniest scraps of fabric ever, they dig into your hips and your butt when worn, and they're way too close for comfort, raising both comfort and health concerns.
Are thongs supposed to be comfortable?
Thongs Are More Comfortable Than They Appear
While thongs are not for everyone, they are more comfortable than they appear. ... In fact, many thong lovers argue that thongs (more so, g-strings!) are one of the most comfortable panties due to the lack of fabric that can easily become bunched or saggy.
Is wearing a thong uncomfortable?
Chafing, cutting and discomfort:
While most women find thongs completely comfortable, some newbies have complained about this, the string on the back can be a bit of discomfort for some women if worn for a longer period of time.