I am sure they do fill in a form to say what type of person they want, but I wonder if sometimes they go out of their way (the producers not the experts) to match people where sparks will fly!
Doesn't really want a woman with children, looks like only one woman on the show has a child - let's lock it in...
Doesn't like curvy women, dates petite blondes, woman who is not like this, let's lock it in...
Wants lots of children and a younger woman, she's two years older (although she looks a lot better than him) and she only wants one child, great - L-O-C-K -I-T - I-N!!
But that is looking at it from the men's side...
Or you could look at it from the women's point and say, a woman only wants one child and they have purposely chosen for her a man who wants a lot of kids.
A woman wants to be loved and accepted, match her with a guy who is very picky and not very attractive....
Or a woman wants someone who accepts the fact she is a mum, and actually thinks that is a good thing... match her with a guy who is not sure/not keen on meeting a woman who children.
Not good all round.