Erotic and other relaxing massages in Monaco are one of the favorite pastimes for its absurdly rich inhabitants. Like everything else it’s ridiculously overpriced, expect the session to cost around €500 and that doesn’t necessarily including the fun stuff. A few touring girls openly advertise their massage skills, like Keira Massage (http://keiramassage.com/). Also escort agencies such as Monaco Erotic Massage (http://www.monacoeroticmassage.com/) operate internationally and will be more than happy to hook you up.
Some sensual massage studio franchises have also made their way to Monaco, for example the immensely popular Tantra Home (https://www.tantrahome.com/), which is located at Boulevard Louis 2. Calling someone over from the nearby Nice is also an option, especially if you’re watching your budget.