I think it depends on the people. There may be some general shared attitudes to give a sense of camaraderie, if they both feel like outsiders from the mainstream, don't do sport, don't like society's pressure to conform, don't do schmooze, prefer to avoid crowds, etc. But special interests might be a problem, if the two Aspies are into different things. NTs are probably better able to take an interest in what the other person likes, so I think sometimes two Aspies will just bore each other by dragging the conversation back to their own obsessions. And Aspies aren't reknowned for their social skills, so they might find it harder to resolve conflicts etc. But like I say, I think it depends who you get. Every Aspie is different.