I get you Raipat, it's just that the idea of SD trends to bring out a mystical element that I don't have much time for. Sending signals is the very start of true SD, but I'm thinking of full on VR style being in the same dream with one or more others like in "Inception". I think that, or something like it may well be possible in the future. Right now, what does shared dreaming mean to you? It has all the hallmarks of a parlour trick if anyone claims to really be able to share the same dream.