Sex and relationship experts have varying definitions on how the act is performed.
It has since become popular enough with couples to be discussed during an episode of the television series Sex and the City. Its gain in prominence has been attributed to its depiction in the 1998 film Pecker, directed by John Waters. It presents a low risk of transmission for many diseases, including HIV. It has also been recommended as a form of foreplay or safer sex. These include gently sucking and tugging on the scrotum and use of lips to ensure minimal contact with their teeth. Sex experts have suggested various techniques that the performer can use during fellatio to increase their partner's pleasure.
And while some may enjoy the stimulation, not everyone responds to it. This makes varying degrees of stimulation an integral part of oral sex. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone.
