In the 80s I took a girl to a hotel with waterbeds. The main aim of the weekend was fucking and we were both really anticipating great sex on the waterbed, but that didn't happen. Mish was OK but doggy and cowgirl were not easy or comfortable, and she felt queasy when we were trying to sleep, due to the motion. We ended up having sex on the floor, on the chair etc. Very disappointing and over-rated!