I learned what a dental dam is and now you can too! Big smiles for dental dams!
Dental dams are a type of barrier method that protect against HIV and other sexually transmitted infections (STIs). If someone is having mouth-to-vagina oral sex, vaginal fluid or blood exchange has the potential to pass an STI from one partner to the other. They also keep prevent STIs that can be passed by skin to skin contact such as Herpes. Keep in mind that dental dams are also useful at reducing risk in oral-anal sexual contact, a.k.a. rimming.
If dental dams are not available, unlubed or dry condoms can easily be made into good substitutes for dams. After checking the expiration date, feeling the air bubbles, and carefully opening the package, while it is still rolled, use scissors to carefully snip off the tip of the condom and then put the scissor through the opening and cut through the condom including the elastic band part. Unroll it and you will have a rectangular piece of latex. If you’re in a pinch, you can also use non-microwaveable plastic wrap.