Will I feel seasick on a waterbed?
Not at all. Unless you move, a waterbed will not move. Any motion you give to the mattress tends to be gentle and soothing and ceases as soon as you stop moving. If you select a very stable mattress there will be minimal movement at any time - even if your partner moves. Remember, the pressure reduced support of a waterbed also mimimises the need to toss and turn while you are sleeping.
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