Comic books are not for kids. They are not for "geeks" and certainly are not for girls. They're for everyone. One of the most important things to happen in comics in the past few years has been the rise of all-ages books.
Is it so shameful to refer to something as a (gasp) comic book? Is there any sort of sophistication to the word? How differently would a conversation go if you choose the word "graphic novel" in place of comic book?