When your performing anal sex with a girl, you cum inside her ass. Then she shits with the cum still with it making it look like chocolate and melted marshmallows inside the graham cracker (butt cheeks). After she has those two things mixed together in her ass you eat it, which will get thing all messy.

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.