when floating on back, with eyes closed, I always feel as if my body is rotating slowly but steadily clockwise, but upon opening my eyes discover it has not moved. I have tried this in 2 swimming pools, a lake, the ocean--both far out & close to shore. The direction of water entering pool, waves, wakes, currents, etc have no effect on it. Does right handedness have anything to do with it? (neuro ) or being in the northern hemisphere? (geophysics) would I perceive counterclockwise motion in the southern hemisphere? It is perplexing--any ideas?