verbalizing a 'thank you' is not part of Thai ways... if you do something nice for someone, the thank you is usually not spoken - it is understood. Of course, 'thank you' - - - my wife spent a year in the West so she always says 'thank you' because it is part of our culture that she has adopted. As many here, I have done a lot to help her family - her father does not say thank you because he does not know that is a thing - - but I can see the love in his eyes all the time. Sometimes he would make a special desert and bring it to me...