谢谢您！我太感动了，他的话吓了我一大跳，我就像一个犯了错的孩子，不知所措。理解万岁！！！

Lest you get the wrong idea, I think XiaoHei's comment, "Skin color is not something we are used to discussing in the English speaking world..."is his opinion alone and not the opinion of everyone in "the English speaking world." In my view, such criticism of another's attempt to learn a language is improper. I found nothing remotely offensive in your comments. There are many people who shy away from discussing matters related to race or skin color. Perhaps the reason is that they do not want others to think that they are prejudiced or biased. However, it's difficult to have a true exchange of ideas unless one is straightforward, frank and open.