Some people have rattlesnakes as pets. They do not sleep with them. When my wife is gone I let my dog sleep on my bed. He IS NOT a pit bull.
When I was young, the first dog our family had was a Golden Retriever, the runt of a litter of twelve, who was afraid of everything. Our mother would not let the dogs on the bed, so we sneaked her up and stuffed her under the covers, laughing all the way. That dog had a perpetually guilty look on her face from all the things that we kids made her do.