1. When you have a sexual dream involving someone that you either despise or could never imagine having sex with in real life.

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.

When one has a sex dream about someone, something, or some situation that they would never want to be involved with sexually

When you have a Sexy Dream, that is both horrifying and arrousing at the same time. Some people still get off on their Sex Nightmares.