The best way to get him out of this bad habit is try to guide him in the right direction with support and encouragement.
There is nothing more infuriating than someone who just expects good things to happen for them with no effort.
This of course will go completely unnoticed by your SO, who will just smile and push past you to kiss her on the cheek. Let's not forget though, that this is if you're lucky and have managed to find one who has actually left the nest already, otherwise good luck trying to get him to move away from all those mommy home comforts.
This could be as simple as you telling him how to cook a piece of pork right or booking a vacation.
If she doesn't know and approve of the neighborhood, you can kiss that apartment you love so much goodbye.
No matter if you get him -- by some miracle -- to agree with you about where to live, or you simply give in and choose an apartment that's "mom approved," don't just assume you'll be able to decorate it how you want.
And no matter how much you try and make him feel better, you won't be doing it right.
Whether it's the detergent you use (If you're nice enough to even do his laundry that is, because why should you?Even if you manage to get him to see your point behind closed doors, just one phone call with dear old mommy and you'll be set to swap your romantic Paris getaway for two with a family vacation.