I’ll doodle and sketch on anything. This was a cup where I drew a donkey into the froth on the inside of my hot chocolate mug. I have drawn with sticks on beaches, creating mermaids and seahorses, into the gravy on my plate when we have been out to lunch, and when I was a child I used a sweeping brush to draw swirls in the dust on our garden path. That reminds me of videos of people painting Chinese characters with ink using a mop. I guess if you love mark making, it’s not easy to stop!