I feel this may be relevant:
As Dr. Cooper points out, you don’t need chopsticks for most food in Thailand. Traditionally, like many cultures around the world, food was eaten by hand, but this changed in the latter half of the nineteenth century. Siamese King Mongkut brought about this and many other reforms that included adopting a spherical world geography as well as improvements to woman’s rights.
But it was his brother, vice-king Pinklao, who devised and implemented the modern Thai use of utensils. After watching the dinner etiquette of an American missionary, he chose the set of utensils from among those presented to be used at his dinners. In practice, this most often includes a fork, held in the left hand, and a spoon in the right. Knives are rarely used, and chopsticks are usually reserved for noodle dishes or dishes from other Asian cultures.