Deepthroating is an oral sex technique in which a sexual partner takes their partner's entire erect penis deep into the throat. Although it is difficult for many people to perform deepthroating as a result of the natural gag reflex, it does create a different type of stimulation that many people find pleasurable. People with penises also report that deepthroating makes them feel like they have a larger penis.
Deepthroating is a sex act that tends to require practice for the giver, as they must relax their throat and learn to suppress the gag reflex.