As they later recalled, the image soon became known as the Nut Button. In case it wasn’t already clear, there is a substantial aspect of horniness to asking #whoup.

A kickstarter is raising money for LoveSync, a two-button device that would let you silently tell your partner you’re interested in sex. It’s pretty much the nut button meme come to life.

Brands including Ralph Lauren, J. Crew, Banana Republic and Folk are among those to have started using Corozo, a supplier of buttons made from the corozo nut native to South America, while Phoebe ...