As you know, we’re each born in a single bubble of liquid nutrients, which we both ingest and excrete into. We roll our membrane-spheres over the plains, using the suns’ energy on our chloroplasts to thrive, until we run out of growth medium to convert to energy, and thus die. However, it’s rumored that on other planets, animals live in non-closed respiratory systems! Meaning at any moment, you could be ingesting the nutritional medium of a famous politician, or of someone making love, or of a complete stranger, dead millennia ago. Can you imagine sharing molecules with so many others?