Erotic massage in Burgas isn’t the city’s strongest suit. You might find a salon or two along the main boulevard, but that’s it. I wish I could say it gets better in Sunny Beach, but it doesn’t. This region is quite fond of a traditional Turkish bath, the so called "hammam", though. You won’t get a happy or any sort of an ending there, but it can get erotic and you definitely can blow off some steam. And there is always the possibility you will get spoiled by hot girls, just not screwed.
If you’re fixed on getting a dose of the good old rub and tug in Burgas then Alo (https://www.alo.bg/) is your best bet. This classifieds site has hundreds of profiles of girls all over Bulgaria offering sensual massage and more.