Yeah, according to him he's young and good looking. He's 31, not exactly the youngest anymore and to further add to it, women typically don't look for looks for men like that. He needs to be more negotiable about some things.
What's your cousins height and weight? Body fat percentage? Does he have abs? Big biceps? Full head of hair? Does he have a tidh?
I think a better survey to do OP: is do a random survey to women with the pictures of your cousin and have women rate him 1-10 on basis of attractiveness, trustworthiness and smartness based on his pictures. Perhaps with that info your cousin will either have further confidence that he is in fact good looking or perhaps he isn't as good looking as he think he is. I think this would be a much better study to do. Don't do it to the "eligible women" of the 40 you mentioned, but do it on a bigger basis. Here's a site you can use pictures.
Again, this is all very superficial and not a very healthy way to screen for well adjusted, well rounded individuals emotionally and physically. Last thing he would want to get is an attractive women that is absolutely psychotic. Think "puja what is this behavior".
>We have never used toys and not sure if we can use it to max efficiency.
Why do you want to do 'max efficiency'??
The goal should be to have fun and be in the moment!
This isn't a game or competition where you need to get the high score everytime. The journey of sex itself is a experience! Live in the moment! Be present! and aware of the moments you two are intimate together.
A good book is called "come as you are" https://www.amazon.com/Come-You-Are-Surprising-Transform/dp/1476762090
Just wanted to suggest -- Both you and your husband could try working thru The Baby Decision book (https://www.amazon.in/Baby-Decision-Make-Important-Choice-ebook/dp/B01FSZ51J6). It might help to gain a better perspective.