I'm not interested in cuddling an animal, or a woman, or stranger is a very telling statement.
If it was ‘just’ cuddles & platonic ones as you seem to be claiming then any of the above would do. But you want it to be a man & specifically the man next door...& you’ve somehow convinced yourself that you’d be morally fine to ‘cuddle’ the man next door if your DH & NDNs wife, and presumably NDN all consent to this very, very weird arrangement!?
I’m not buying it all all, if this is real and you’ve already taken the step of somehow convincing your DH that it isn’t a spectacularly bizarre and awkward thing to ask your neighbours, then step back and listen to your DH before you go & ruin a friendship.
Not only will it make the wife deeply suspicious and, at best, pity you it’ll make the poor bloke want to dive behind the bins every time he sees you in case you decide to mount him & hump his leg!
Basically I’d assume you’ve very clearly got a massive crush on your NDN, it’s a bit embarrassing for everyone, far more obvious than you realise and if you do nothing it’ll probably subside. By ‘he looks like he’d give good cuddles’ pretty much everyone will assume you mean ‘I’ve been fantasising about him and I’ve come up with a cunning plan’ (it’s not cunning btw, it’s batshit!)
But top marks, if genuine, for the most convoluted attempt to try and get into someones pants that I’ve read on here for a while!! Don’t do it though OP, I’m cringing for you already...SO awkward & desperate, they’d probably laugh about it for years to come but avoid you like the plague forevermore, I know I would!