Why ladies are always prepared for a Fight with Another Lady?

With due respect to everybody, reply honestly and no more cat fights here please.

Our observation so far....
The top most behavioural & natural reasons are
- Jealousy
- Competition
- Ego
- Temperament (mood swing, etc)
- what else???

even with age, maturity, the female style or mindset won't change much.

May be sometime diplomatic in Public to protect her image :)

I wanted females to defend their case....