“When I grab something hard, then I can feel it in the fingertips, which is strange, as I don’t have them anymore. It’s amazing,” said Robin af Ekenstam , who lost his hand when an aggressive tumour was discovered on his right wrist.

How would you like a fancy Christmas garment embedded with sensors to measure your body movements? Or a reindeer hat that moves its horns when your heart beats faster? Don’t worry if you’re not a fan of winter festivities, because the technology behind the next generation of smart clothes is for everyone and can be woven into anything we wear.

Sharing emotions is a central part of human communication. Moreover, the internet is becoming an important medium to share them. And this has given rise to collective emotions in online groups.