It is a type of oral sex. Its etymology is the noun form irrumatio of the Latin irrumo (to suck, to make someone suck). Whereas in fellatio the woman takes the initiative in the act, in irrumatio the man takes the initiative and has the partner place his penis in their mouth. The man stands and has the partner kneel and place his penis in their mouth. He places his hands on the shoulders or head and moves them back and forth. The partner lies on his back and straddles him. The man derives pleasure from inserting and removing his penis in the partner's mouth. Not only does it cause physical pain during the act, it can also cause illnesses such as temporomandibular joint disorder and stomatitis. If the male penis is long or thick, it can cause fear of suffocation and a sense of fear during the act. If it is performed without the partner's consent, it can be said to be a dangerous sexual act that is generally considered to be ●●●.