'Over-the-edge' is a common position for deep-throating. One common position is to align the giving partner's mouth and throat into a straight line (like a sword swallower), but many different positions are possible.
Relaxation of the throat muscles of the giving partner is the most important aspect of positioning. There are several positions that are well suited for performing deep throat. The technique and term were popularized by the 1972 pornographic film Deep Throat. The person whose penis is inserted is usually referred to as the receiving partner, and the person who performs deep-throating is referred to as the giving partner. For deep-throating, the penis has to be long enough so that it can reach the back of the recipient's throat.
The practice is a type of fellatio when the giving partner is in control, while deep throat penetration by an actively thrusting partner is called irrumatio both are a form of oral sex. Deep-throating is a sexual act in which a person takes their partner's entire erect penis deep into their own mouth and into the throat.
