I did a Visa run to Ranong a couple of years ago and my friend and i went to the area where the Burmese girls are ( i forget soi # ). We were suddenly surrounded by 30 or more 4 ft tall Burmese girls who couldn't speak English . They were all giggling and could only say,..." i love you ". So it was difficult to find out what services they would do. When i made the international sign for a BJ , by putting my tongue in my cheek, etc , you should have seen them vanish,....there was a collective gasp and they fled as if the BiB had turned up.
When i asked the Thai pimp in my broken Thai why no BJ, he said,..Buddha no like. Apparently it was similar with Thais many years ago . But economics overran religion.