He's a pretty laid back guy, doodler, so I suspect that rather than communicating telepathically, he was communicating in his sleep. He tends to be a sleep talker and he uses the "f" word a lot in his sleep. For example, last night, in the middle of the night, I sneezed.
Ah! That explains everything. At first it was foggy and surreal. Then I began wondering if I'd died or if my XW had returned. It's a relief to know that it was just Sparky's dream.