First attempt at a cow. Suggestions welcome.

I facepainted yesterday at my company picnic. They asked and I am always looking for new kids to practice on, so I told them I would for $25.00. I forgot all of my pages that I normally take so I can look at something while I'm painting. This was a great learning experience for me because the kids didn't have pictures to look at so they came up with things on their own. Things I wasn't prepared for.
A little boy wanted to be painted as a buck (male deer). Luckily there was a guy that had a photo on his cellphone that I could look at. The little boy was happy, I wasn't too impressed. Adding 12 points to the antlers must have been sufficient.
Another boy wanted a dragon painted on his arm. I have done simple dragons on faces so I started out making the wings. He wasn't impressed. Said it looked like a butterly wing and wanted me to wipe it off and do exactly as he told me to do. I recognize I have some work do to make it to some of the quality I see online, but this really hit me the wrong way. I tried to keep quiet. I did exactly as he asked and he was content when we were finished. I asked him if he ever saw a real dragon. He said they aren't real, so I added, how do you know they don't have wings then! Ugh!
I painted a two year old and she sat well but was so excited that she wanted to continually show everyone instead of look at me. I gave her one of my paint brushes and told her to paint my face while I painted hers. Worked pretty well. My face was a mess but one babywipe and we were ready to move onto the next person. What do you do in that situation?