What happens when a sexologist mom (me) finds XXX-rated graffiti in a middle school textbook? The following Carnal Nation column answers this question. Sexology is indeed where you find it, and for me, reading the things kids had written in this book was a valuable learning experience. 

http://sf.carnalnation.com/content/40335/999/middle-school-confidential

My column also references the late child development sexologist, Dr. Loretta Haroian. Her monograph on Child Sexual Development can be read here, in the Electronic Journal of Human Sexuality.

http://www.ejhs.org/volume3/Haroian/body.htm