I got a good reputation about my video on youtube. A woman who is clever gave me a nice comment about English in the video. I ordered Korean stir-fried glass noodles with rice. It was nice, but the person who delivered it asked “don’t you pay tip?”. I said no because I thought delivery service does not need to be paid tips. However, she was angry “You are not polite. I drove to come here for 7 miles!”. She almost said “fuck you”. My friend gave me an advice you should pay a tip for delivery service. I regretted my behavior.