Sex message on Chipotle cup

"My son's Chipotle cup says 'reproductive sex' on it," wrote a mom who posted this photo to Reddit. It also looks like the cylindrical object is penetrating something. The text below it reads, "Who wants to feel so small?"

Confused? I was, too, until I learned that it's part of Chipotle's "Cultivating Thought" series. The cup was illustrated by James Gulliver Hancock, and is inspired by something Anthony Doerr wrote for Chipotle:

Tattoo Earth's 4.5-billion-year timeline onto your arm, shoulder to fingertip, and your upper arm will get nothing but geologic mayhem: meteorites, magma, acid rain. Life won't begin until your bicep, and from there to your wrist it's all single-celled, oceangoing stuff. Reproductive sex won't show up until your wristwatch, and creatures that are finally big enough to see—tubes and fronds and weird Precambrian plant-animals—will crisscross the back of your hand.

Actually, I'm still confused. But I eat at Chipotle about four times a week, and I am excited they've added dinosaurs and sex to the good music and tasty food.