[アンソロジー] ぴゅあぷちっと Vol.12
#25783 - The father asks the boy, How do you know? The boy replies with a big grin, Because I licked the frosting off the sheets this morning. The next day they go to the zoo and there are two monkeys getting it on and a the boy asks his dad, What are they doing? His dad replies, They're baking a cake.