It might be a fetish.He might just like them.They actully help me with stress+I think they are awsome.Chances are the best years of his life was as a kid.Mine where...It was before every one moved away leaving me to be the only child in the neighborhood.
But the reason I want them is not cause I'm a bed wetter...I loved them even before I damaged my bladder and became one!
You should do it.It will higher his self-esteem and he'll remember he has a wonderful parent like you!But one thing you should do before you treat him like a baby is give him a list of what he wants to do.don't make him use a bottle and eat mushy food!let him choose if he wants soda or milk or both!Just let him customize this choice.
One more thing.don't take it away. He will feel like he let you down and will feel like you don't want to except him.It aint normal nor wierd either...just don't say no or take them away!if you want to say no just make him pay for them instead.Hey!you get free labor and he gets free relaxation!and he will work harder since he likes them so you get 100$ work for 2-4 dollars an hour!doing that will also make you say "you can do it...but with a price."