Monogamy is great for shaking things up when you're in a sex rut, explained Emily Morse, sexologist and host of the Sex With Emily podcast. It's just like Monopoly, so if you've got that down, you'll get the hang of Monogamy($25). "Players can start slow and work their way toward hot sex," she said. You can start with communication and more romance with the pink cards, use purple for more passionate actions, and finish up with the red cards, where things get hot.