Explain SMBC — the wiki for Saturday Morning Breakfast Cereal

The Joke

The comic's title panel reads: "NOAH'S URETHRAL SWAB RESULTS WERE PREDICTABLE." A doctor tells Noah (the biblical figure known for building the Ark and gathering two of every animal): "I'm afraid you have two of each kind."

The Humor

The joke is a play on the biblical story of Noah's Ark, in which Noah famously collected two of every kind of animal. The comic imagines that this "two of each kind" principle has extended to Noah's personal health -- specifically, his STD test results. The punchline works on two levels: it implies Noah has contracted every sexually transmitted infection in existence (two of each kind), and it connects this to his defining biblical characteristic in an absurd way. The word "predictable" in the title adds to the humor, suggesting that of course Noah, the man defined by having pairs of everything, would naturally have pairs of every disease too. It's a classic SMBC move of taking a well-known religious or mythological figure and finding a crude, unexpected logical extension of their defining trait.