What's the special significance of birthday cake givers in Thailand?

People who deliver cakes on their birthdays in Thailand are their very important friends. Birthday ceremony is a birthday, and doing good deeds will be rewarded, just as the Buddhist said: people who give food, strength, clothes, cloth, skin and transportation give happiness, and those who are bright and busy give eyes. In addition, there are: give people roses, leave lingering fragrance, give people satisfaction, give people good things, and get good things from themselves. Give something sacred and you will reap something sacred.