To have the highest chance of picking the very best suitor, you should date and reject the first 37 percent of your total group of lifetime suitors. (If you're into math, it's actually 1/e, which comes out to 0.368, or 36.8 percent.) Then you follow a simple rule: You pick the next person who is better than anyone you've ever dated before.-- "When to stop dating and settle down, according to math". Ana Swanson, February 16, 2016, Washington post.
When I was one-and-twenty 
         I heard a wise man say 
"If you would wed a maiden, 
         Then listen to my lay. 
Let N denote the number 
         Of women you might like 
First date N over e, 
         And tell them, 'Take a hike.' 
And then you ask the rest 
         To dinner, one by one, 
And when a girl outranks 
         The others, then you're done! 
That way you'll maximize 
         The probability 
Of marrying the best 
         Of all the girls you'd see!"
Considering the cir- 
         cumstances of my life 
I thought I'd spend two years 
          In looking for a wife 
With one date every week.   
          I couldn't manage more. 
I did the math correctly: 
          N=104.
Date number 17 
          Was Anne. That girl was great! 
I yearned with all my soul 
          To be her lifelong mate. 
But it would be unwise 
          To abrogate my plan 
And finish prematurely 
          So I said "Goodbye, Anne."
After 21 more dates 
          I reached the second stage. 
A date could now be married 
          To share both youth and age. 
And then I met Viola 
          On number 59 
An angel from my dreams! 
          I vowed to make her mine.
I thought how wise I'd been 
         To heed that learned man, 
To exercise due patience,  
         To dump inferior Anne. 
I told Viola boldly 
         That she was now my choice. 
She gently gave me answer 
         In her mellifluous voice:
"Oh darling! I adore you 
         Much more than verse can say. 
And out of 40, you are 
         19, so that's OK. 
But Sid, my 7th suitor," 
         She breathed a wistful sigh, 
"Was just a wee bit cuter, 
         And so, my dear, goodbye."
The women who came after 
         Were neither cute nor fun. 
Until I dated Janice 
         At number 101 
Such charm! Such wit! I loved her 
         Almost as much as Anne 
But "almost" only counts 
         In horseshoes. Goodbye Jan.
So now I'm two-and-eighty. 
         I've led a lonely life. 
For I have never known 
         The comfort of a wife. 
But still it's very pleasing, 
         As I recall my quest, 
To know that my procedure 
         Was PROVABLY THE BEST.
This is part of the collection Verses for the Information Age by Ernest Davis