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有一个外国女友是种怎样的体验？首先声明，我相信的是爱情。
这里我随便说说自己的一些想法：
标题里说的是“中男白女”组合要比“白男中女”组合要少见，我觉得是符合事实的，不论是在国内国外，的确“中男白女”组合出现的概率相对更小。在英文里，“亚男白女”组合叫做AMWF（Asian Male White Female），我和老婆出街见到另外一组AMWF，都会特别留意，很多时候大家会眼神交流一下、互相微笑，因为上街随便遇到AMWF的概率真的不大。
至于统计数据，其他答案里已经有提到。在跨种族婚姻中（interracial marrige）里，“亚男白女”的概率的确是远远低于“白男亚女”的，至少在美国是这样。 首先，在新登记的异性恋婚姻中，“亚男白女”和“白男亚女”的比例大概是4:11。
但是我觉得这些数据的意义不大，主要是因为，我们这里讨论的是“中国男性”和“外国女性”（白种人）的组合，而不是同一国家中“亚裔男性”和“白种女性”的组合。 这两者差距很大，这个问题里问的是“跨国婚姻”（international narriage），不只是“跨种族婚姻”（interracial marriage）。“跨种族婚姻”不见得是“跨国婚姻”。
就好比说，我是中国人，我是中国国籍，我在中国长大，这和一个在北美出生长大的亚裔男性（可能都不会说中文、没有在中国生活过），情况还是有些差距的。
对于“跨种族婚姻”来说，我觉得很多因素会令到“中男白女”组合更少见，比如主流文化中对亚裔男性的刻板印象（stereotype）、亚裔自身的身份认证问题（identity issue）、约会文化（dating culture）、家庭压力、社会经济阶层、对不同文化的暴露（exposure）等，这里很多答案都有提到，不多说了。
但是对于“跨国婚姻”来说，除了上述一些因素，还有很多实际因素我们要考虑到。比如： 1. “中男”在哪里遇上“白女”？在国内，会不会存在“中男”遇上“白女”的机会本身就比较少？相反，在国内的单身、异性恋“白男”存有量比较大？中国人去国外留学工作的数量应该要比外国人（发达国家）来中国留学工作的数量要大得多吧？ 2. 如果“中男”是在国外遇上“白女”，那“中男”最有可能是留学生或者曾经是留学生，如果已经决定在国外居住就算了，很多人并不知道自己将来要去哪儿，还有很多准备要回国。所以，很多人本身对“跨国婚姻”不是太感兴趣，或者家人对于婚姻伴侣有比较多的要求，甚至会出现“回国娶妻”的现象、“娶”与“嫁”区别对待，感觉这样的情况在上一代人中出现较多？
@简唯 这里提到了，不如我说一下吧。不论是“中男白女”，还是“白男中女”，其实中方很有可能会受到很多来自家庭的压力、阻挠、和不解，很多时候这样的组合就这样无果而终了，不会说因为是“中男白女”就很顺利。我们也不例外，我和家里因为这段婚姻也发生了很多冲突。
3. 如果“跨国婚姻”是在外国展开的，那么我们不可能奢望“白男”或“白女”会说中文，毕竟我们是作为留学生、外来务工人员过去的，那么语言能力就很重要了。女性对第二语言的学习能力是显著强于男性的，会不会因为“中男”的外语能力比较“落后”进而导致沟通上更多屏障，从而也会导致“跨国婚姻”更难展开？
女性在学习第二语言上，的确是比男性要更强的，我们可以参考下面这个研究： The Gender Gap in Second Language Acquisition: Gender Differences in the Acquisition of Dutch among Immigrants from 88 Countries with 49 Mother Tongues
The Gender Gap in Second Language Acquisition: Gender Differences in the Acquisition of Dutch among Immigrants from 88 Countries with 49 Mother Tongues作者对27,199名学习荷兰语（作为他们的第二语言）的成年人进行了研究，作者发现，女性在口语和写作的表现上总是显著好过男性，而在阅读和听力上，则不存在性别差异。
还有一个很重要的结论，就是当作者控制了其他可能会影响到语言能力的因素后（比如教育程度、到达荷兰时的年纪、在荷兰居留时间、学习荷兰语的时间长度），以上的性别差异依然是显著的。
有趣的是，作者发现了一个性别和教育的交叉效果，也就是说女性接受语言教育的成效比男性很更好。
Female learners consistently outperformed male learners in speaking and writing proficiency in Dutch as a second language. This gender gap remained remarkably robust and constant when other learner characteristics were taken into account, such as education, age of arrival, length of residence and hours studying Dutch. For reading and listening skills in Dutch, no gender gap was found. In addition, we found a general gender by education effect for all four language skills in Dutch for speaking, writing, reading, and listening. Female language learners turned out to profit more from higher educational training than male learners do in adult second language acquisition.
别人我不知道，我最大的障碍就是美国的韩梅梅总不按套路来，
第一天
我：Hello, I'm Li Lei
韩梅梅: hey, I'm Han Mei Mei，how's it going？
我：(嗯？不是应该问我how are you吗？） humm, I'm going to library.
韩梅梅: Cool, you mind if I tag along?
我：（好像是个问句？） eh.......hum..... I'm fine, thank you, see you tomorrow.
第二天
韩梅梅：Hey Li Lei, what you up to？
我： (这是问我上几楼？）I'm going up to third floor, for my class.
韩梅梅：Yeah, I know that, we are in the same class.
我： (那还瞎B问）OK, how are you？
韩梅梅：Same old, same old
我： no, you look very young.
韩梅梅：haha, thanks, i'm flattered.
我：I don't think you flat, I think you are at least B-cup.
第六十天
韩梅梅: I figured you are a very interesting guy.
我：Thank you, I think so too.
韩梅梅：How about you help me out with mid-term tomorrow, and we hangout afterwards, go see a movie or something.
我： Ok.
..................................
第六十一天 考试结束
我：you so slow, I waited 40 minutes.
韩梅梅：Fuck off you jerk, I thought you were going to help me out
我：I'm sorry?
韩梅梅：I asked for your help.
我：I gave you my pencil.
韩梅梅：I don't wanna talk to you anymore.
As a white girl, the first reason I believe is that Chinese guys just don't ask white girls out. The truth is everything always starts with the guy. There may be some girls who are going to ask a guy out if they like him but it's just a small minority. The first move always depends on the guy so if there's a white girl who has many white guys asking her out and no Chinese guys asking her out, of course she is going to end up dating a white guy. I think it's very logical. I know one Chinese guy. One time he told me he thinks white girls are beautiful so I asked him if he ever had a white girlfriend. He told me he didn't have. So I asked "why? There are no white girls living in your city?" And he said "there are many of them here but I never dared to talk to any of them." I mean common even a handsome rich Chinese guy is too awkward to talk to white girls? It's just too ridiculous.. White girls are only human too so if you are interested in dating one of them then just talk to her. But if I give someone this advice they will say "but my English is too bad. I can't speak English." Well yeah that's another reason - English or language barrier. If a white guy comes to China and wants to date a Chinese girl he will just use English to talk to them. If he finds a girl that can't speak English, he can always go find another one with better English abilities. If a Chinese guy wants to date a white girl he will most likely have to talk to her using English as well because most of white girls just can speak no Chinese. If a white guy wants to date a Chinese girl he just has to find one that can speak English, if a Chinese guy wants to date a white girl he has to learn how to speak English.. It's quite unfair I know. There are only few white girls capable of communicating in Chinese and if the number grows I believe there will be more Chinese guy/white girl couples.
Recently I've seen there are actually more and more white girls dating Asian guys a most of these guys come from South Korea. I think it has a lot to do with the fact that these days seeing Korean guys in western tv programs is becoming quite common. Korean pop is becoming famous worldwide, so you can see Korean guys everywhere. Liking Korean pop music made many white girls become interested in dating Korean men and I think the knowledge that Korean guys are now so popular has also improved the self-esteem of guys from South Korea and made them more outspoken and less afraid of talking to foreign girls. White girls will watch handsome Korean guys on tv singing and dancing and suddenly see Asian men in different light. No longer nerdy and awkward, as Asians are usually portrayed in American movies, instead they have become men, girls can imagine falling in love with. So I believe if there are more handsome and charismatic Chinese men in western movies or tv shows or if there are Chinese singers that are famous worldwide it will make white girls much more interested in Chinese men and maybe it will make Chinese guys see themselves as equal to white guys.
从我身边朋友的情况来看，情况1和2是最普遍的...大家都不去刻意追，当然看不到亚男白女组合；不追，谈什么难与不难？
难与不难只能在情况3里讨论。个人觉得，到了追求的阶段，难度不会和追中国姑娘有太大区别。（追的难度本身就是一个坑...每个人的自身条件不同；你只是要个白人姑娘就行，还是要漂亮又聪明的，难度又会大大不同...难以讨论）
----------------------------------------------------------------------------------------------------------- 不同的吸引力
相比白男亚女，亚男白女的比率确实要少，所以题主觉得“亚男追白女难，白男追亚女容易”。假如这个结论的推导是对的，那么我觉得原因是，总体来讲，亚男对白女的吸引度比白男对亚女低。OKcupid（美国网络约会网站）有一个有趣的调查（How Your Race Affects The Messages You Get « OkTrends），如图
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