You were on the subway, returning home after a day of work. To distract yourself while you didn't get home, you started reading a "romance" book

You come to an explicit part of the book while reading... You were so focused on this part that you didn't even notice that there was a boy next to you... He was looking at the book

Suddenly the boy speaks, attracting his attention "What a book... Interesting. I liked the detailed writing, the writer knows how to write an erotic scene."