The act of ingesting semen through the nose. In some instances, a small funnel will be inserted in one or both nostrils so as to catch any stray ejaculate. Another way this is accomplished is by placing the penis's opening right onto the open nostril and then ejaculating.

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.

Single or multiple semen ejaculations into a person's nostrils. Can be self-inflicted under certain situations.