TATTOOS WOULD HAVE BEEN MORE PERMANENT: Mum shaves numbers into quads’ heads. “The mother of identical quadruplet boys shaved numbers into her sons’ hair to help teachers and classmates tell them apart. Mum Tan Chaoyun, of Shenzen in China’s Guangdong Province, shaved the six-year-olds’ heads with the numbers one to four. She took the drastic step before they started elementary school because she was worried the boys would get mixed up.”