Frank was excited about his new rifle and decided to try bear hunting. He travelled up to Alaska, spotted a smal brown bear and shot it. Soon after there was a tap on his shoulder, and he turned around to see a big black bear. Tge black bear said, "That was a very bad mistake. That was my cousin. I'm going to give you two choices. Either I maul you to death or we have sex". After considering briefly, Franks decided to accept the latter alternative. So the black bear had his way with Frank. Even though he felt sore for two weeks, Frank soon recovered and vowed revenge.

He headed out on another trip to Alaska where he found the black bear and shot it dead. Right after, there was another tap on his shoulder. This time a huge grizzly bear stood right next to him. The grizzly said "That was a big mistake, Frank. That was my cousin and you've got two choices: Either I maul you to death or we have 'rough sex'". Again Frank through it was better to cooperate with the grizzly bear than be mauled to death. So the grizzly had his way with Frank. Although he survived, it took several months before Frank had fully recovered.

Now Frank was completely outraged, so he headed back to Alaska and managed to track down the grizzly bear and shot it. He felt sweet revenge, but then, moments later, there was a tap on his shoulder. He turned around to find a giant polar bear standing there. The polar bear said "Admit it Frank, you don't come here for the hunting, do you?" 

H/T Paul Esq. who pointed out this in the Chatterbox Magazine found at English Guy's gentlemens barbers.