This requires extreme precision and potentially a release waiver.

When you are fucking somebody doggy style you pull a plastic bag over their head cutting off them from air. You wait to cum until the very moment your partner is about to pass out, then pull out and stick your dick through the bag and as your partner gasps for air, you shoot your load in their mouth.

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.