When a girl gets off the bed after intercourse and the guy puts his index and middle finger into her vagina and thumb into the anus and pulls her back to the bed.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

A slight curvature of the index finger inserted into the anal cavity of your love companion.

During vaginal sex from behind, i.e. doggie style, the man, or woman with strap on, inserts index and middle fingers into the anus of the pentrated. Forming the fingers into a hook shape, the woman is lifted up and down on the phallus by the "hook", or hand, as if she were a piece of "meat." Hence, New Jersey Meat Hook

The unusual method of inserting one's finger in the ass of your partner while screwing her, and feeling her cervix. This procedure is most effective from behind.