Oral sex refers to any form of sexual activity that requires stimulation of the genitalia with one’s mouth, including lips, tongue or teeth! Oral simulation of other body parts including the breasts and mouth and are not considered part of this. It is popular among couples since the chance of STD transmission is lesser (though it’s still feasible) and there’s no risk of unwanted pregnancies. When a male performs oral sex on a female it’s called cunnilingus and the reverse is called fellatio. 69 is a popular sex position where both partners perform oral sex on each other simultaneously. The act is considered taboo in many countries and would actually be considered illegal under the archaic Section 377 of the Indian Penal Code (an act against nature) that was recently brought into force by the Supreme Court.