Not sure if this question is a bit weird... I'm still a young researcher. I was wondering if it is okay to co-author papers with one's friends who are also doing research in a close field to one's research.
Having friends who conduct research (even if it is at another institution) that is close to one's research is a really motivating factor, and being on close terms with someone, in my opinion, may really improve the workflow and the harmony in the work. In your opinion and from your experience, what do you think about this?