Please mummy

The small boy has become ludicrously polite of late. I've always tried to do the 'please' and 'thank you' thing by example rather than demanding he say them all the time. I really don't think he should have to say them every time he wants something that an adult can easily get for themselves, like a snack or a drink or a book to read. But recently he has been saying please a lot. An awful lot. I think he's cottoned on to the fact that it's harder to say no to him if he's being ever so polite about it. He even says please when he's making crazy requests like: 'Please mummy can I cut your leg with my scissors. Pleeeease mummy.' Er, no little man, you can't.