If rock in the master bath is determined to be cost prohibitive, this tile option would work too.
... you kiss my back ...
Flirting. Cafe life
Apartment in St. Petersburg by Pavel Isaev
Frank Horvart. Au chiem qui fume, Pour Jardin des Modes, 1957
They had plans to leave the house and do something fun, but they love each other's company so much that they choose to spend the afternoon at home reading books...