EXPLAIN SIBLING RIVALRY TO ME... I have been through HELL and BACK, and yet I still can't figure out why my Sister and I (at our age!!) still bicker back and forth like we do. After all this time we should be able to, at the very least, accept eachother for who we are...respect the differences between us. I can pretty much pick apart every other issue in my life, and chew it up into a fine pulp, before it becomes totally digestable...But not this!! What the fuck?