Sexual position. For optimal results one of the pair should be sporting a ginger bush and the act should take place on a bearskin rug. A couple engages in a standing 69. When the standee climaxes, they drop to their knees thus driving the bottom feeder's spinal column into their brain.

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.