But it's primarily down to the significant increase in people getting divorced after the age of 45 - forcing flocks of inexperienced divorcees out into the dating world after decades of monogamy.
We're back in the work force, if indeed we ever left it when our children were young, with more money and a knowledge that we can take care of ourselves financially.
If a woman's financial position is no longer a barrier to her moving on from an unhappy marriage, neither does age seem to hold us back from trying our luck romantically second or perhaps third time around.
She says: 'Thankfully, I'd kept myself in good shape and I'm still a size 12, but the idea of whipping off my smalls in front of a near-stranger was pretty terrifying.
'The first man I slept with was a 50-year-old lecturer.
And these soaring figures are set to surge still further in the decade ahead, as women, in particular, feel less inclined to put up with flagging relationships. In my own social circle, I've witnessed at least a dozen marriage breakdowns in the past two years - including the demise of my own relationship after 25 years.