Erotic massage parlors in Geneva can focus on the actual massage, since they don’t have to act as a front for brothels. Although a bit pricey - after all it is Switzerland - the service you’ll get at a proper studio is more than worth and a happy ending will be part of the deal.
Paradis Zen (https://massage-tantrique-naturiste.ch/) at Rue Du-Roveray 14, which is also a naturist SPA is the place to go if you’re into tantric massage. Diva Institut (https://www.divageneva.ch/) at Place De-Grenus 4 is a cozy, little studio with candle-lit rooms and young masseuses, and it also dubs as an escorts agency!