Who doesn't love a bit of frolicking in the bathtub, or maybe even in a Jacuzzi? If you need some inspiration on how to find the best aquatic positions, check out the first waterproof bath books for adults, the French Livre de Bain pour Adultes has two titles so far, Jeux et énigmes pour se mettre dans le bain (bathtub games and enigmas for adults) and Kamasulo (bathtub Kama Sutra). Rub à dub dub!