I'm not necessarily talking about "celebrating" the bitter, but we certainly ought to be able to joke about it. Shadow and light are to be equally embraced in order to find balance and wholeness. People who emphasize only the "sweet" tend to be just as unbearable, in their sweet-and-delicate think-only-white-light-thoughts fluffiness, as people who dwell only on the dark side of life and can find the cloud in every silver lining.

I think it is both sane and healthy to have a capacity for both sentiment and sarcasm, not to mention to have a sense of humor. Goddess preserve us from the humorless at either end of the spectrum!