I buy your book, I read it, I give it to my friend. My friend enjoys your book - perhaps he passes it on. This does not change the fact that your cat needs to

I buy your book, I read it, I give it to my friend. My friend enjoys your book - perhaps he passes it on. This does not change the fact that your cat needs to eat. Perhaps there's another way for you to get food for your cat, than taxing my friend for reading your book?