I suspect that he knew the other dog had bed privileges and he wanted the same! Now that he's gotten a taste of that heaven, it might be pretty hard to convince him to sleep alone.
Our dogs all sleep on the beds with us, but still use their crates for daytime naps.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."