Our lab-coated cousins down the hall at Consumer Reports may test all kinds of products extensively, including mattresses, but we’re fairly certain they’ve never produced a ratings chart like this one. Hilariously-named sleep product review site Sleep Like the Dead polled their users to find out which type of mattress is best for the second most important thing that most people use their beds for: sex.

They approached the analysis with a surprising amount of scientific rigor. Memory foam mattresses, for example, are a recent innovation, and have distinct disadvantages. For example, their users note that the mattresses’ superior traction impedes “active” lovemaking:

Some owners say that the way a person sinks into the foam provides too much “traction” which can discourage partners from moving around and changing positions often. Lower-density memory foam mattresses, however, tend to be easier to move on than higher-density memory foam mattresses.

Mattress Types and Sex Suitability Ratings and Comparison [Sleep Like the Dead]

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