Stella wants Sam to go skating with her. Instead of admitting he's afraid of slipping on the ice, Sam says he has to sit with Fred and keep him company. Stella proposes making a snowman that can doggy-sit for them.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.