Imagine being trapped in a box of Pringles for the rest of your life. It's that bad.
Personally I would have compared it with being trapped in a bag of Skittles
Hidden Image/Members OnlyMore seriously, it's a tough one. Guess everyone's different. With you having a review 3 years old, looks like you had already started punting before this starts to reach a terminal stage.
Some can still love there partner yet need some physical needs met.
Others can no longer have feelings with their partner and therefore looks for not just physical gratification but also some kind of intimacy on top.
There are various kind of punting reasons. Hard to know which one is yours.
I guess one of the key question to ask yourself is, why is that making you feel guilty NOW. Ask yourself, you're the only one who can answer. If the worst was to happen, how would that make you feel if you continued. Is the urge so strong you cannot put it on hold to alleviate your dilemma for a while ...