In Wilde's The Important Of Being Earnest, Lady Bracknell declares that while losing one parent may be regarded as a misfortune, losing both could be regarded as carelessness.
Colourful singer Sinead O'Connor seemed to be thinking along similar lines this week, when she called herself a "silly cow" and a "twat", because she has had four failed marriages under her belt.
"I think I was trying to be normal," she said, ruefully. "Of course there's nothing at all normal about marrying people you hardly f***ing know."
Sinead's first marriage to producer John Reynolds lasted four years, and they had a son together. The singer also has three children, by journalist John Waters, musician Donal Lunny and Mary Coughlan's ex-husband, Frank Bonadio, respectively.
Her other marriages were to journalist Nick Sommerlad (two years), Australian musician Steve Cooney (eight months), while the most recent, to drugs counsellor Barry Herridge, lasted 16 days.
While it's understandable that Sinead harbours a few regrets over her romantic life, I think she's being very hard on herself.
It is clear that she is a woman who loves deeply and passionately, and let's face it, we are all guilty of acting crazily when under the influence of the intoxicating first flushes of love.
I may not have skipped up the aisle with the men who stole my heart in the past, but I would have done it in a heartbeat if I wasn't so goddamn cautious and choosy.
And actually, now I wish I hadn't been quite so picky, always holding out for the perfect person, when he probably didn't exist. At least Sinead kissed a few frogs, and showed herself willing to take a chance on love.
So what if they didn't ultimately turn out to be her prince with whom she lived happily ever after? At least she tried and remained optimistic and open to possibilities.
Some of us shut down after one bad experience, while others never open up in the first place.
The thing about making mistakes or trying and failing is that it teaches us about what we really want from life.
Regrets are pointless, as experience is life's great teacher. It is only by following our hearts and instincts, and yes, usually learning the hard way, that we find out what is not for us, and what actually enriches us.
You only have to see Sinead perform to know that she is a woman of great passion and depth.
I hope that she doesn't shut herself off to the possibility of love, or become scarred by the blame for the failed relationships that she is clearly heaping on herself.
One day, Sinead will meet the right person, and when she does, she will know it's right, because nothing will compare to him.