One day, Lu asked me how people date in America. I gave him a rundown of the typical stages, from meeting to exchanging contact info to dates to relationship.
Me: ... So at some point after you've gone on some dates, you have a talk about whether you're exclusive.
Lu: Oh, in China, it is assumed that if you go out two or three times by yourselves, then you implicitly agree to be exclusive.
Me: Yeah, in the US you usually have to state it explicitly.
Lu: Is that also when you say "I love you" to each other?
Me: No!!!!!! That usually happens much later. Often months later.
Lu: Oh. In China it happens early on. Actually, we say "I love you" in English quickly, but "我爱你” ("I love you" in Chinese) later.
Lu: American dating is so much fun! One needn't have too much pressure hanging out and making out. In China the fifth time you date a girl, you'll probably have to ask her to be your girlfriend.
Me: In the US you can just have fuck buddies. If you're into that.
Lu: What is that?
Me: From urbandictionary,
7. a special friend that you fuck.
Example: "would you like to be my fuck buddy?"
Lu: I see.
[ ... much later in the conversation ... ]
Lu: btw in USA is it polite to ask a girl you meet to be your fuck buddy, according to the example sentence in urban dictionary?