Naturally, everyone wants to be at the top of the hierarchy, looking
down upon everyone else. Females are naturally incredibly competitive
creatures, especially amongst themselves. They want to show off, stab
each other in the back for personal gain, and be more valuable to male’s
than all of their friends.
http://thisistrouble.com/2014/03/24/hacking-your-sexual-marketplace-value-as-a-female/