Totally agree with what you are saying on why H may have felt MBing was a unexceptable thing. Females have the same issues if you MB you are slutty blah blah.
I also agree Mr Gel may feel the urges to peek at porn later. But don't feel this is as problematic as others might. If Gel is open to it Mr Gel has nothing to hide. I do not believe Gel is anti porn as much as anti lying and decieving to the point it short changes her. I think as Mr Gel becomes more secure in her exceptance of him He may take the lead in acting out some of his fantasies instead of being lead through them by Gel. Gel may find one or two that leads to a place she does not want to go. But if she listens to them and says hey I am not really into doing that but we can watch a video pertaining to that. Example alot of men fantasize about two woman Gel may not want to walk that walk but she can still play into it by watching a video with him that includes this aspect of his fantasy. She has still excepted his desire not made him feel a freak and held her boundries of what see is willing to do. She has still excepted him as is. Still loves him and finds no disgust in him so it can continue being shared EC which is a good thing.