A mom shared this photo below on Imgur, with the caption "My son's Chipotle cup says 'reproductive sex' on it." This is a fairly neutral statement, though there are other words on the cup. She could have written, "My son's Chipotle cup says 'cultivating thought' on it." Or "My son's Chipotle cup says 'who wants to feel so small?' on it." Therefore, we must assume the words "reproductive sex" have some significance to her, though they are the least sexy words about sex ever strung together.
The words are actually from Anthony Doerr's Cultivating Thought series, which he worked on for Chipotle. Here's the full text:
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.
Maybe she's only upset because Chipotle is trying to make everyone read poetry without their consent. Commenters on Imgur are happy to jump to the conclusion that she's just an idiot, though:
If your son is old enough to understand it then he's already heard it, otherwise he's too young to understand it.
As a father of 5, is there any other kind of sex?
It's art. Grow up
Oh no education and art on a cup. How are you going to protect him from these sins.
How will she protect him from sins and a 700 calorie soda? Throw the whole thing in the trash!