Since you mentioned your experience, I'll confess and share about the first time my Mom found my porn stash, as well. That was very early HS and had assembled quite a decent collection from a variety of sources. I had forgotten to bring my gym clothes to school and called to see if she could bring some to me. (We basically lived across the street from the school and even though she had a job, it wouldn't be too inconvenient for her.) When I went to the office to pick up the clothes she had delivered, I was shocked to see that my (free with subscription) Sports Illustrated gym bag waiting there for me. I had stashed it in the back of my closet...and was where I stored my entire collection of pervy porn. I worried that she'd be pissed, as she had obviously had to remove the entire collection in order to use the gym bag. I assumed she'd be disappointed that I had so many Playboys, Penthouse, and Hustlers...but assumed I could justify or laugh them off....but...I was very, very seriously worried about the kinky paperbacks.... including a few Greenleaf Classic Paperbacks by Kathy Andrews such as "Making Mother", "More than a Mother", and "Their Loving Mother". The Playboy type girlie mags were one thing...but paperbacks that unquestionably reflected my growing Taboo desires...that was a whole different level.
When I got home, much to my pleasant surprise, I found the entire collection of girly mags stacked neatly on my bed...with the Mother/Son paperbacks in a short stack right next to the mags. I had not only survived...but also learned that my Mom would not freak over porn...even if it focused on the most Taboo of Taboos.
Ahhh...memories.