Shared Daydreams

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Shared daydreams, daydreamssharing, or daydreambleeding is the sharing of daydreams between headmates of a system, subsystem or sidesystem. This usually happens with systems that have MaDD, But this is not necessary to have shared daydreams.

This can happen involuntarily (this could be called daydreambleeding) or voluntarily (this could be called daydreamsharing)

Shared daydreams vs. thoughtsharing
The difference is that one shares daydreams (a more immersed "thoughts", like a dream) and the other shares thoughts (something more objective, like thinking about what to eat today). Someone who shares daydreams will not always share thoughts.