Not exactly a language question, but a cultural confusion: I have recently made friends with two Korean women in my area (Catholic nuns--I'm Catholic too; I met them at church). They are immigrants who speak only basic English. They're very kind and friendly, and they keep giving me presents, bags of things like sweets and soaps. They do this at every major holiday and every time I visit. At first I thought they were just being generous, but now I'm starting to be concerned. Is it because of something in Korean culture that I don't know? Do they expect me to give them gifts in return? I know very little about any Asian cultures, and would be grateful for any input.