In the Thai language, guava are known as farang, which is also the word for foreigner or westerner, so when I, a farang, ate a guava, people giggled. The guava I ate in Thailand were green and not very sweet or tasty. I didn't like them much, so I didn't eat them much, obviating one common reason to be giggled at by the Thai. They had plenty of other reasons to laugh at me.