Let's just say that it's normal for
anyone to look at porn...
and if it's hidden from you, maybe he doesn't feel comfortable broaching the subject just yet. Perhaps he thinks you will be judgmental or critical of him. Or he considers it a matter of his privacy. I'd say just take it slow. If you confront him with it, he might take offense to you snooping. He hasn't broken any rules or betrayed you.....so try not to take it personal. Because, trust me, it's not.