He absolutely has NO MANNERS.
A treat that I leave for my cat-sitting kitties may look something like this -
Sometimes a treat is not food. Some cats are not over-the-moon about treats. They would prefer a little nip or a scratch under the chin or on the ear. Just your attention and company can be enough for some cats. Like Dominique, lets say. She prefers to just sit by you and bask in your attention to her. Laying on the carpet reading a magazine is just heaven to Dominique.
So, Dominique and I have been to heaven today. I hope you had a wonderful day, too.