Explain SMBC — the wiki for Saturday Morning Breakfast Cereal

This single-panel comic imagines what religion would look like from the perspective of sperm cells. A sperm cell stands at a podium preaching to a congregation of fellow sperm, declaring that if they follow "The Lord" in their "spermy life," they will reach "Egg" and move on to "the next life." Those who do not follow the righteous path, however, will go to "Sock."

The joke is a biological parody of religious concepts like heaven and hell. For sperm, the ultimate salvation is successfully fertilizing an egg (being "born" into the next life), while damnation means ending up in a sock -- a reference to masturbation. The comic applies the structure of an afterlife sermon to the reproductive journey of sperm, finding absurd humor in mapping theological concepts onto biology.