It's for oral sex. It is placed over the womans vagina and the man licks the dental dam to provide pleasure for the female.
Dental dam, a device used to protect the mouth during oral sex, is made of the same latex as used in condoms. Dental dam can be purchased at any adult/safer sex stores.
the dental dam your dad had to use on your mom?
It is a device placed in the mouth to isolate a tooth during a procedure so not to get any saliva or water on the tooth. :) Dental dam is a rubber membrane which prevents bacteria and saliva getting in the area that is worked on, especially when the dentist is using materials that are sensitive to moisture. They are fixed with a bracket and no pain is experienced. Here's a video showing the use of a dental dam - http://www.checkdent.com/en/videos/what-is-a-dental-dam-106.html
A piece of dental dam.
A dental dam
5
The tooth behind the one you're working on
see:http://www.sexualityandu.ca/adults/sti-4.aspx
A "dam" is a block or impediment, which holds material in place and/or prevents its motion. The typical dam is a large structure, usually concrete, that blocks a waterway. It may be designed to retain water (a reservoir) or to create hydroelectric power. Other dams can restrict the flow of air, or other fluids (the dental dam used in dentistry).The word dam (related to dame) is also applied to a female parent in some animals.
Used dental equipment may be purchased at Cascade Dental, Dental Planet, Independent Dental and Collins Dental Equipment. One may also purchase used dental equipment at Shop Used Dental.
How a dam is used to make electicity The dam holds back water from a river or similar.
You can purchase dental dams online through mass retailers like amazon.com and medical or healthy supply websites. Dental dams can be expensive so be sure to shop around to get the best deal.