I wrote a similar article such as this some time ago in response to what is my most popular search term on Kelake. Since I know nothing about this topic I turn to wikipedia for an answer. Unfortunately this is all I could find.
“Erotic massage is the use of massage techniques for erotic purposes. For example, instead of draping the subject’s body with towels, an erotic massage is usually conducted with the subject naked and undraped. Areas of the body such as the areas around the groin and intimate parts of the body, which are normally not touched in therapeutic massage, will be touched in ways that increase sexual arousal. Erotic massage can be used as part of lovemaking, and its techniques can be used to enhance other sexual techniques. Erotic massage may be utilized as a means of stimulating the libido, or increasing the ability of a person to respond appropriately to sensual stimulus. In some cases, erotic massage can be a form of foreplay without sexual gratification, intended to heighten the sensitivity of an individual prior to another engagement where sexual arousal and fulfillment is intended. In other cases, erotic massage may be used professionally to desensitize a man to the sensual touch of a sex partner, such that he may increase his sexual stamina and avoid premature ejaculation. It is also offered as a service by some massage parlours (not to be confused with establishments that offer only therapeutic massage). In this case, erotic massage may be considered to be a form of sex work, or a form of sex therapy.”
You should note that body massage in Taiwan in general is poor so it might stand to reason that this experience might be also.
Edit: perhaps the articles below might help.