To be selling watches in his and her sets. What if a father just wants to buy two ladies watches for his two daughters? Or two female business partners who don't have husbands who want to buy a pair to celebrate a business milestone together? So many scenarios... It's like Chopard wants to bundle things on their terms. Sure, force them to buy two, and keep it in one big box so the two people have to be very close together to share the box.