Rita carrying a pepper spray in her handbag is trying to fullfill SAFETY NEEDS according to maslow's hierarchy of needs. Safety needs are protection from elements, security, order, law and stability. This law is an actual fact because people are rational and in need of protection.
I think it would have to do with your circulation..? Decreased Circulation to be precise.
Answer:
Because for whatever reason, some women feel that they need to become as skinny as a pencil to be noticed. That, mixed with the uncertainty and hormonal unbalances of puberty, and they'll literally run themselves into the ground trying to reach the unattainable standard for beauty that society (mainly men) have set.