No More Kissing! — Emma Chichester Clark

Momo doesn't understand why everyone around him is always kissing - kissing hello, kissing goodbye, kissing boo-boos, kissing crying babies. He wants to put a stop to all this nonsensical kissing, starting with his family. But when Momo is put in charge of his new baby brother, he just might come to realize that kissing isn't so terrible after all. Momo the monkey decides to put a stop to all of the kissing of boo-boos, babies, and especially of him, but he has trouble following his own rule.