The first time I got winked at by one of my three sugar gliders, I instinctively winked back - it's now a part of our daily 'meet' ritual... usually when I 'visit' when they're 'up', I will stick my head into the cage and one by one each will come up to me and we touch noses. Then, some winking begins ~ seems to be a sign of being relaxed and cool with everything. They also seem to always leave me a part of their treat every morning, unspoilt and tasty! I think they think I'm one of them, just weird, and I'm thinking I am too ;-)