The embarassing experience

I think the most embrarassing experience since I'm in the USA is being pulled into Victoria's Secret. When my mentor pulled me into the shop, she asked me whether I would buy some for my girlfriend. At that moment my girlfriend was just by my side. We both feel a little embarassed. She also asked me whether I want to see my girlfriend to wear these underwears. Actually I didn't know how to answer these questions because I'm a litte shy about this kind of question. Maybe it is caused by different culture. My mentor also said that she want to show her body to her boyfriend. Although China now is an open country, it is still not open enough for some people like me to talk about this. Maybe I should do just as my mentor said 'this is America; you should be open.'