Interesting thread.

I feel the controlled experiment would tend to spoil the effect if the environment was not right. It would undermine the element of playfulness that Tattvamassi emphasized. And the thing about closeness brought a word to mind, 'telempathy' - i.e. it is an empathic non-verbal communication.

As far as a medium of communication goes, have we considered the degree to which the electrical field of the human body extends outwards in space? I would suggest that the types of feelings described in the OP could in part relate to bioelectrical fluctuations. I have seen with my own eyes how electrical fields can be detected at a distance of several feet from the human body.

I myself have experienced many instances of what I can only describe as telepathy, and of course it works best with people with whom one is close.

My particular LSD/psilocybin related telepathy experience was a bit different from the OP. For one thing it occured more as a bizarre coincidence in communicating with my mother, and was not instantly verifiable as my mother lives some 300 miles away.

So, a few of us were celebrating Albert Hoffman's 103rd birthday in the way that seemed most appropriate. My, how we laughed! Anyhow, at some point I was dancing around and in the midst of my altered state I started to mime and visualize the form of a giant teacup. At one point I could clearly see that I was dancing around inside a giant teacup until one of my friends said something and distracted me.

The curious thing was the following day I spoke to my mother on the telephone and enquired as to what she'd been doing recently - she replied "We had a giant teacup at the church the other day for a fair trade event."

I swear in all honesty this was the first I had heard of any such thing from anyone, there were no verbal cues in either direction and naturally I had not mentioned the previous night's activities (it would have been far too difficult to explain). Needless to say, I was exceedingly surprised...