I'm a perfect example of why you should never, ever ingest gluten. I, too, thought it might be okay to cheat occasionally, and I even read an article that said that after the small intestine heals, some people could actually eat gluten again. Was I wrong!! I cheated a few times by eating pizza...and after the third time, I became unable to absorb iron and had to have weekly intravenous infusions of iron. My boss wasn't too happy that I had to have a three-hour lunch every week in order to receive the infusions, and I had to use my vacation time. Eventually, I was diagnosed with cancer and the chemo miraculously healed my small intestine so that I no longer needed iron infusions (but no one wants to go through chemo, believe me).
A few years later, I accidentally ingested some gluten, and I ended up suffering from malabsorption of Manganese and Zinc so that my tendons and ligaments became floppy. As a result, both of my feet fractured a week apart. It took me eight months to figure out which nutrients I wasn't absorbing, and I spent that time limping around with a walking boot on the foot that hurt the most.
So, if you think you'd like to end up like me, sure, go ahead and cheat. Once the gluten is out of your body for a while, your immune system becomes strong again and reacts violently to the smallest ingestion of gluten. Want to test this concept? Believe me, you don't want to go there!