How to use a what? Oral Barriers are also known as dams or dental dams. But knowing their different names does not always help people know what they actually are or what they actually do. What is an oral barrier or dam? A dam is a sheet of latex or polyisoprene (non-latex) that is used as a barrier when performing oral-vaginal or oral-anal sex. They are used to help reduce the transmission of infections that can occur during these activities.... Continue reading