My wife and I like to use those delusion calculators to show each other how special we are. The websites where you put in the dimensions you want your partner to be: this tall, this white, this rich, Mohs hardness of at least 7, flexible on general viscosity.
She'll enter in how much I make, how much I way and so on until the website reports back that I am indeed the most special of men.
I don't think it's valid because she puts that I'm black and young and that I make a lot of money and that right there is enough to winnow the field even if thats not what most people are looking for.
After she's made her point I have a go, and I make a show of how broad my range is. I always say I don't care about income and I put that I'm OK with overweight but no obese. Height needs to be taller than a couple microns, and I'm not particular about race. Age goes down to 20 and up to 45.
Despite all that, my hypothetical pool is still sub 25%. I always go back and put in my wife's measurements exactly and that returns an acceptably small number.