The Demi part means that you're not romantically attracted to people unless you form a strong bond with them. Therefore, when you see random people or whatever, you don't feel attracted to them unless you fall for their personality after you get to know them. So, you don't really get "crushes" like most people do.

The Panromantic part means that if/when you fall for someone, they could be any gender, meaning that you could be attracted to any gender or gender identity.

The Asexual part means that you're never attracted to people sexually and you don't desire sexual interactions like making out, having sex, that stuff.

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.