If you follow the paintbrush with your eyes while not moving your head, it forces you to use emdr, which is a therapeutic technique to calm anxiety/panic. Watching fish swim causes the same effect.
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from: https://lemealon.tumblr.com/post/39053774385
recommended: lemealon tumblr, AsianNipples #biglongnow69 AsianOL bigmfbooch AsianPee