can someone please explain to me where/what is one's natural waist?
and what other waist types should i be aware about?
natural waist is around the belly button. If you're relatively fit, it's your skinniest point.
Your unnatural waist is that odd looking mole just above your hip. You should get that checked out.
Your supernatural waist is in the 2nd/3rd intercostal, and is the area I once aimed for. Being superhuman of course.