Monkeys are one of the animals you often see in random places around Thailand. Not as common as Soi dogs or elephants working the sois, but they are common at certain tourist attractions and temples. Usually there are people selling bananas or long green beans to feed to the monkeys. The furry little things usually snatch the food from your had and run a few feet away and chow down. Some of the adult monkeys will bully the little ones and steal their little bananas. So if you want to make sure the cute little ones get enough food, you kinda have to chase them up a flimsy tree to where the bigger monkeys can't get to them easily and then feed them from there! Otherwise the bigger ones will whack them on the head or back, and steal their food.
Last time I fed the monkeys, I was down to my last few bananas and offered one to a monkey "guarding" the men's toilet. In true sentinel form, he leaned forward, looked me in the eye, and screeched angrily as if to say "I don't want your stinkin' banana, go pee somewhere else white boy!" I then stuffed my camera in his face to which he went absolutely bananas, pardon the pun!