I think they must be snuggly... DS finishes feeding and throws his arm around the boob, rubs his face against it and sighs in bliss, it's the cutest thing I have ever seen... *gushes*
My DS does this too and he's 16mths old. I love it when he rests his head on my boo's and takes in a big breath like he's sniffing the best smell in the world!