As you know, we all have different anatomical sizes. In some cases, the amount of lubricant in Reality may not be enough. If the outer ring does go inside, remove Reality and add extra lubricant at the opening of the anus before putting it back in. Add extra lubricant. Be sure the outer ring lies flat over the anal area.
Studies show that it is unlikely for Reality to rip or tear during use.
If this does occur, remove it right away, throw it away, and insert a new Reality. Reality has been designed to fit the averaged size penis. It is not necessary because in effect Reality is a condom, covering the penis and the anal cavity during sex. Reality is designed for penile insertion only. Yes, providing the outer ring remains outside the anus and all contact is protected by the barrier sheath.