Board Thread:General Discussion/@comment-26159109-20170417104929/@comment-25733960-20170417183941

Eskaver wrote:

Every kiss isn't TLK. There must be some sort of sacrifice or willingness to sacrifice involved, or going the extra mile. Regina broke the curse because "the extra mile thing" which includes the idea that she intended to break the curse. Thus Snow and David didn't break the Dark Curse. If David was somehow dying of pixie-dust-itis and there was no earthly cure and Snow kissed him during the curse with her memories intact, I'm certain that the curse would likely break. (Or Rumple specifically made the first curse to be Emma-exclusive.) Belle and Rumple's kiss was about the break the Dark One curse in 1x12 and there was no sacrife whatsoever.

Same with Gideon and Belle's kiss in 6x01