I think I can answer this question. the answer is actually very simple. you can find the reason, if you closely observe how beach boys behave. have you ever seen a beach boy that looks like an ordinary Sri Lankan? no, obviously they don't they represent our culture. our culture almost alien to the foreigners, and the language, cuisine everything. but at the same time, the beach boys do behave almost alien to us, they are outliers from us, they are the bridges to us, the natives and the tourists. and the beach boys maintain their look that familiar to the foreigners. Bob Marley style long hair, ponytail, braided hair, and the language. have you ever seen a local who fluently speaks German, French, Russian? no, but beach boys can do speak a few languages. even though they don't have a proper education, they pick essential words, grammar and mix that with some English and start speaking, and they are extremely friendlier, hence foreigners feel they are familiar. after landing here, they found something that they can feel, something that they can deal with: the beach boys.