I tired to find the post here ar HW where I put the link for those pictures and I cannot for the life of me find it...so if a mod or anyone eles could step in to find it and re-post it that would be great...then I'll copy it into my favorits...
What you are describing mississippi girl does sound like perianal crohns skin tags.
To my understanding perianal crohns skin tags are diseased tissue and that's why if you have them cut off the skin won't heal properly.