On the contrary, it's a little too cheap.

Prehistoric humans wore belts. Archaeologists found fragments of animal skin wrapped around a belt 7000 years ago, and speculated that it was similar in shape to a baby diaper. The ancient Greeks also used belts. Historians suspect that only slaves wear them, and citizens seem to be naked under their shirts. The ancient Romans wanted to diversify, some wore long underpants, and some wore belts.

T-type underwear is generally worn according to the occasion. For example, wearing close-fitting tights can avoid the lines of underwear destroying the performance of hip shape, but it is easy to cause hip sagging. C-type underwear and V-type underwear can be unified into sexy underwear. There are many styles of these underwear, which are far from the function of protecting buttocks and shaping, but they should be worn on some occasions!