As an American... we have had conferences about sex. Same in pre-marital counseling. It is God created and enjoyable.
Maybe because it is when you talk about it and not that you talk about it? Or differences in culture/customs?
I think "cultural differences" could be a good way of framing it.
I see Americans as being a bit picky, and easily disgusted, on the subject. So while I wouldn't call it Puritan, it may be hard to relate the cultural differences at times.