I was speaking towards this specific comment in your post
'I occasionally look under the skin, pull it back just slightly to inspect the size of the opening, and his opening. I never pull it back any harder than, say it would be moved naturally in his diaper
We looked under his foreskin, it is red, slightly swollen, inflamed, and has about three small ulcerations"
To me that comment is retraction which equals the same as messing with foreskin so...