Hands always suffer from wrinkling when they stay in water too long but it seems that there is a good reason for it. Kyriacos Kareklas and colleagues of Newcastle University have found that while wrinkled fingers are no better at handling dry objects, they do function better with submerged objects.
Fingers could complete a task involving passing objects from one bin of water to another through a barrier with a small hole 12% faster after soaking for 30 minutes in water. This does makes some sense – after all, it is only hands and feet that wrinkle when soaked.