Do you have any sexual secrets you keep from your wife/gf?
For me it's foot fetish stuff. Every damned thing else is on the table but before I could make the lethal mistake of talking about it, she expressed her giga-ick about the issue. To this day I thank God I saw the metaphorical fly hit that electric fence before I walked into it.
I had, but not anymore. This scenario you explained in your main post was actually similar and part of the reason I wanted a change in partner/go to my preferred style of relationship.
For me that would have been a decision over whether it was worth it to leave. Compared to everything else she's okay with and all the good things she's brought into my life the single sexual issue I don't bring up is simply not worth breaking up with her over. Of course that's up to each person to decide whether it's worth it.
It definitely isn't quite that rational for me. I don't really want to compromise in a relationship very much at all. It's not a decision of "it's mostly positive, so it makes sense to stay together", but rather, "I'd like to experience something, but I'm not allowed to do it here. So I'd rather find a relationship where that is possible." I'm not afraid of being alone for a while.