When Ryka was a pup, she’d dodge my hand and avoid head pats. She always wanted to be physically close, but I’d never describe her as very “pettable”. She didn’t want to be physically coddled outside of her own terms. It actually used to upset me a lot, but I came to terms with it.
As she matured, however, that changed. She now likes to sit beside me as I scratch her head or stroke her neck fur. She’s currently asleep stealing my leg room as I lay diagonally on our queen sized bed, lol. She loves it when I gently rub her ears or pet her from head to back. But that didn’t come until well after the land shark phase and until she was more mature and had garnered an appreciation for physical affection in the form of petting.
I will add, though, that she only seeks physical affection from me. She doesn’t care to be pet, cuddled, or snuggled by anyone else. She genuinely hugs me when I come home... everyone else she walks up to, wags her butt happily, then walks away.
Some dogs love it right away, some grow to love it, some never do. Unless the dog is aggressively defending itself from you when you initiate harmless physical attention (in other words, just petting his neck or body gently), I think it’s just your dog putting up boundaries and not understanding that pets can be rewarding.
Here’s a picture of the aformentioned leg room stealing beast. My legs are cramped, but she’s just so darn cute...