Professional wrestlers may be violent in nature, and they may seem to hate each other, but I thought all that stuff was fake? In real life, they are all big buddies riding down the road together, right? Well, no. In some cases, a rivalry between two wrestlers can be as real as it gets. Sometimes they fight over women. Sometimes big egos get hurt. Sometimes these guys legitimately hate each, and sometimes they go out there and work a great match together at the same time. The marks (that's us) would never know the difference. Trust me, it's happened plenty of times. On occasion, this legitimate hatred that boils up and festers between wrestlers doesn't go away for months, years or decades. Sometimes it lasts all the way to the grave. Most men are stubborn, but expecting two big behemoths to kiss and make up is an even bigger stretch. Many a grudge has been held between superstars, and it often gets in the way of more productive opportunities. Let's take a look at some of the most famous and most heated real life rivalries, between some of the finest, and see how they came about. Buckle up, because it's bound to be a bumpy ride.