When a woman becomes wary of random men that ask her out after meeting in social situations. Typically seen in single, attractive, childless women over the age of 25 that live in conservative places with a large gender imbalance like Houston. This happens because the women are hit on so much when young all social situations feel like being dropped into a shark tank. A major difference in views on sex from the northesterners and west coasters that move there for work causing the gender skew makes them wary of all men.

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.