The answer comes to you easily. A guardian arrives in the middle of the enclosure and starts distributing fruits and nuts. You observe as other monkeys and apes come forward and the treats are handed out to them. Nothing bad happens and you feel more secure. Looks like it's safe. You clamber down your tree and move on all fours to get to the tall biped giving the fruits and nuts. He's very talk and quite nice., handing out tasty goodies like that. He offers you a banana. Oh, great! Exactly that you wanted! Your favorite fruit since... since... Since forever, you guess... You fleetingly think about something else you liked, grilled meat between buns of bread, and a long pieces of meat with a tomato and spicy liquid between two buns of bread too. But... That makes no sense. Your diet is made of fruits and nuts and roots or leaves. Humans might give you cake or bread, in small pieces, but those were from humans. Easting meat? Yuck! What a ridiculous idea! Why would you even think about that? It's a preposterous notion! You grab the precious banana in your hand and you hop to the nearest tree, deftly escalated it so as to eat it in peace without being bothered. You peel it and dig your teeth into the pale yellow flesh. Delicious! What other great fruit could there be compared to bananas? Before you knew it, you had swallowed several mouthfuls and were bouncing to the ground for more.
After three bananas, your belly felt quite full. The sky was darkening and you felt tired. Very tired. Sleepy, actually. Other monkeys and apes were settling in for the night too. Some were already sleeping. There seemed to be a lot more animals in the large enclosure than when you arrived from... from... from somewhere.... which was... Your mind felt hazy. Where were you before living in this immense cage? Well... You had always lived here, right? Or in a jungle which was exactly the same, probably... All your thoughts escaped your mental grasp though and you think it is better to just go to sleep. So you settle among branches and leaves and drift off. Unbeknownst to you, this was helped by the sleeping drugs spread on the treats offered. Thus you did not react as you were picked up and placed in a cage, off to be sold to a zoo and away from Pleasure Island. Your notion of fun was altered forever. From now on you'd have much simpler tastes and pastimes from when you were a human.