Oral sex stories relate to the giving and receiving of oral pleasure. Oral sex generally refers to sexual activities involving the stimulation of the genitalia by the use of the mouth, tongue, teeth or throat.
Specifically, Cunnilingus refers to oral sex performed on females, whereas fellatio refers to oral sex performed on males.
A subcategory, Analingus, refers to oral stimulation of a person's anus, both male or female. Oral stimulation of other parts of the body, such as kissing lips, nibbling breasts or licking, are usually not considered oral sex. Blow job, bj, giving head, deep throat, going down, licking out, rimming, sucking off, blowing are all phrases you are likely to see in these types of stories.