These Wikipedia Entries are Totally NSFW
Fellatio
Describes the etymology of “fellatio:” “[t]he English noun fellatio comes from fell?tus, which in Latin is the past participle of the verb fell?re, meaning to suck.” Dedicates an entire section to “deep throating” as well as a graphic illustration. Features a section on ingestion of semen. Contains a video of a fruit bat performing fellatio on another fruit bat.
Mammary Intercourse
Describes that mammary intercourse can “also be combined with fellatio.” Indicates that the act is safer than penetrative sex because it reduces the possibility of infection with an STD. Lists slang terms for mammary intercourse: “titfuck,” “titwank,” “French fuck” (UK) and “spagnola” (Italy). Details that mammary intercourse can lead to a “pearl necklace.”
Bukkake
Wasn’t even sure what this was until I found it on Wikipedia – “a person being ejaculated on by several men.” “Bukkake” is, apparently, “a form of the Japanese verb bukkakeru (?????, to dash or splash water), and means “to dash,” “splash” or “heavy splash.” This is funny because “bukkake,” in Japanese, can also refer to food cooked a certain way, “where the broth is poured on top of noodles, as in bukkake-udon and bukkake-soba”
Cumshot
“Typically used by the cinematographer within the narrative framework of a pornographic film,” Wikipedia tells us that cum shots are also called “money shots” by the pornography industry “because the final ejaculation scene has become an important element in pornographic depictions, in part because it proves to the viewer that they have witnessed an authentic sexual act.”
Fisting
This entry has an entire section dedicated to describing fisting techniques such as the “Silent Duck” and “Double Fist/ Side Prayer.” Wikipedia tells us that Crisco is a popular lubricant for fisting, especially among the gay/BDSM communities and that it can cause “death of the bottom by means of air embolism.” It has a picture gallery of fisting hand positions, and a list of the “people noted to have engaged in fisting.”