A registered sex offender has been charged with sucking the toes of a woman at a Charlotte-area Walmart. Lincolnton police arrested 31-year-old Michael Brown Thursday night. He is charged with misdemeanor assault on a female. Police say it all happened after Brown convinced a woman he was a podiatry student and persuaded her to take off her shoes. Detective Dennis Harris said the woman agreed to try on several pairs of shoes at the discount store in Lincolnton, and that at some point during the process, the man stuck her foot in his mouth. Harris said the man apparently tried the same thing at another Wal-Mart 15 miles away, where he told a woman he was conducting a survey on the feet of different races and nationalities. The second woman also agreed to take off her shoes, but left when the suspect asked her to remove her socks. Brown was convicted in 2001 for breaking into a house and sucking on another woman’s toes.