So over the last 4 sessions on my back they have all been 6hrs and 900. I tipped 200 on all of them because I really like my artist and feel that he is working quickly and doing a badass job. After the last one he said "You don't have to do that everytime man". So I was curious, what then would be appropriate? Is skipping a tip so often on a project like this ok? or just lessen it? or bring something else instead (heard food/baking is good, but im single and cant cook) Thoughts?