n) a night in which the males penis begins hard but by the end of the night is softened

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 someone performs oral sex on a man while their mouth is filled with spaghetti. The reasoning is that the texture of the spaghetti will create a pleasurable and exciting sensation on the man's genitals.

just like spaghetti. before the spaghetti is boiled it is stiff but after wards it softened by the heat. This is what happens to the males penis in the spaghetti night.