I'm so glad you highlighted this. I've had 400ish professional massages in the USA/Europe over the years. Some just made me feel better. But most massage therapists had the training and talent to physiologically fix whatever sciatic nerve/lower back/hamstring/shoulder issue I was having at the time. These therapists attend a 2-year massage school, study anatomy, pass a stringent state massage board exam, and log hundreds of hours of massage clinic time with supervision before graduating.
In addition to the handsome grins and bulging biceps of the masseurs in Thailand, one of the first things I noticed was lack of technique on the massage table. In some cases I thought they might actually doing damage - pressing WAY too hard on my veins or putting a lot of pressure directly on my spine. Both big no-nos. In both cases I told them to stop or adjust. Which they were happy to do.
I will be sure to not let things go in the wrong direction with future hotties. I'm not there to have them crack my back. No. Slide their dick back in my crack? Yes please!