A reptile on the back of a man

Today at the Santa Clara Art and wind festival, I sat next to a man with this on his shoulder. I thought that it was a rubber thing, so, I askd if it was real. The man touched it and it started to wiggle. I asked if I could shoot a picture of it. I don't know what it is. It is on the back of the man here. He said that it was cheaper than a girlfriend.

Done