我们在电影里看到的美国人，他们婚恋观很开放，真正做到了“身高不是问题，年龄不是距离”，只要有火花（only if they have passion）。When passion kind of burns out, they will definitely break up.
看看《老友记》第1季第22集这段对话，Monica跟一个小她几岁的“大学生”谈恋爱，朋友们都是什么反应。
[Scene: They are having a chat at Central Perk.]
Monica: All right, I'll see you guys later. (raises)
Rachel: Off to see young Ethan?
Monica: Thank you.
Joey: How young is young Ethan? Young?
Monica: He's...our age.
Chandler: When we were?
Monica: Okay, he's a senior in college.
Ross: College?
Joey: Rob that cradle.
Monica: He’s smart, mature and grown-up.
Ross: Mature and grown-up. He’s a big boy.
Chandler: Whoa! And this manchild has no problem with how old you are?
Monica: No, of course not. It's not even an issue. Because I told him I was 22.
All: What?
Monica: Oh, I can't pass for 22?
Phoebe: Well, maybe 25, 26.
Monica: I am 26.
Phoebe: There you go.
这段对话比较简单，但可以看出来，朋友们对Monica“姐弟恋”百般调侃。解析：
（1）off：adv. means away or from where something is
英文中的小词（麻雀虽小五脏俱全）经常蕴含着巨大的能量，像“do”。
“Off to see sb?”要去见某人？
例：We’re off(=we are leaving).
It happened while his wife was off on a business trip.
（2）He’s our age. 他和我们差不多大。
Chandler平时最喜欢打趣别人，Ethan前面加上了young，可见很小啦，他就问：
（He’s our age）when we were? 我们要倒退几年才和他差不多大呢？
（3）he's a senior in college. 他是大四学生。
归类学习：把大一~大四一起记一下
freshman n. a student in the first year of high school or college
sophomore n. a student in the second year of high school or college
junior n. a student in the third year of high school or college
senior n. a student in the last year of high school or college
（4）rob that cradle
cradle means “a small bed for a baby that you can rock(=move gently from side to side)”：婴儿床
望文生义，想想这个词什么意思呢？
“rob that cradle” means “to have a sexual relationship with someone who is a lot younger than you”：老牛吃嫩草
（5）Monica说年龄完全不是问题，这个小男友“smart, mature and grown-up”。
这里的grown-up=mature, adj. means behaving like an adult
它的动词形式：grow up，在口语中表示“said to tell someone to behave more like an adult, especially when they have been behaving in a childish way”
例：
比如我讲了一个成人的正经的话题，朋友们都在窃笑。我可以说：Would you guys grow up?
<相反>“孩子气”怎么表达？
例：
If you guys wanna be children about this, that's fine.
（6）26岁的Monica谎称自己才22岁，啧啧啧！还反问朋友们：I can't pass for 22?
If somebody or something passes for something else, people think they are that thing, although they are not really.
例：
Even though Shawn’s only 17, he’s so big and tall he could pass for 21.
It’s amazing what passes for entertainment on TV(=what bad quality things people will accept as entertainment).
最乌龙的就是，事情发展到最后，这个Young Ethan turns out to be a senior in HIGH SCHOOL! So Monica has no choice but to break up with him. 看来老外也觉得年龄是个问题啊！至少在“姐弟恋”中，女方同样承受着巨大的压力。