Why do girls wear jeans with the button undone?

mrsingle
So this girl I know always used to wear a belt to hold her jeans up, she's thin. Recently I haven't seen her wear a belt, but she always has her jeans button undone to the point her pants constantly slide down. She eventually buttoned them but they still slide down. Her stomach is flat so she can button them. Why purposely make them loose and not wear a belt? Could it affect how the jeans look on her by keeping the button undone, perhaps a slight baggy look so they aren't too tight in her upper leg area?
Updates
+1 y
Do any other girls do this?
Why do girls wear jeans with the button undone?
7 Opinion