Dental dams are like a thin sheet of rubber films uses as a barrier protection for women during oral sex. Unlike condoms using dental dams don t require any correct technique to follow. One needs to just pull out the dam and spread it over the vagina or the anus before giving oral sex. This helps to reduce the risk of an STD transmission through an open sore bleeding gums or cuts in the oral cavity. So if you are using a dental dam here are some dos and don ts to follow to ensure safety and minimal risk of