Copying is not all easy

My copycat son picked up a bad one yesterday. He saw someone at school licking their fingers to flip pages… that’s a lousy one and yes I’m sure it was at school (We had a dragon of a librarian and even now if I ill treat a book her disapproving face swims before my eyes, so no chance of that happening at home).
He, however, didn’t quite get the hang of it. Yesterday during homework time he was busily turning pages.. licking the fore finger of his left hand and turning pages with the fore finger of the right hand.. lick with one turn with the other.. lick n turn… lick n turn.