[She figures that the reason he is confused is because of that, so she continues to explain.]
The way people react to the question is not always the same - some are more comfortable with the topic than others. However, it is always considered safe to assume that another person will not wish to discuss it unless the two of you are close.
[Now, she'll get off her education horse a little and just smile in a friendly way.]
I already said I do not mind, because you are the one who asked. I suppose there are some things about my life that you should know, like about Conrad and I...However, before I am distracted, I remember that I have not answered your first question.
[She blushes just a little, but she makes herself say at least one basic statement, for his benefit.] Sex is a very intimate act, and it is generally not discussed in mixed company. I would suggest that you ask Sheik [haha, throwing this on you...] about it in detail at another time.