I didn't used to draw or write on my arms/hands very much, but I remember one time in my senior year of high school, when I had a crush on a guy named Adam, I wrote "I love Adam!" on my hand because my friend was urging me to and we thought it was funny, and then this other kid who was also named Adam, who I found very annoying, saw it and thought I meant him and kept flirting with me and driving me crazy. So that's my writing on my hand story LOL.