Easy
Women shop for diamonds (alexandrite for those in the know)...rare, one of a kind, worth waiting for the perfect one. And just anyone won't be the right one.
Men shop for refrigerators....gobs of them out there, anyone will do, they just buy the first one that fits the spot in the kitchen.
PS,
And as we get older (and this is just my observations)....many women get more independent and happy in their circle of friends....many men start frantically searching for a nurse with a purse for their pills and bills. ;)
Seriously...of all the old widder wimmen I've known around here, few if any dated, much less wanted to get married again. And it wasn't as much grief for a lost spouse as embracing a new life that they really enjoyed.