OPHIDICISM
Ophidicism (ophidi: snake) refers to people who use reptiles. The snake in the form of a circle biting its own tail has been a representation of sex since early Egyptian civilization. The snake represented the male organ and the ring that it formed symbolized the vagina.
Today one finds magazines and movies available of women who insert snakes or eels tail first into their vaginas and masturbate as the creature wriggles to get free. Slow moving snakes that don't bite are used for this form of sex. Ancient Roman women differed only in that they inserted the snakes head first. CAUTION: People can contract salmonella from amphibians and reptiles.