Oral fixation?

My dog is now about 4 months old or so (He was a stray so i’m not to sure).

Recently his behavior has changed. He wants to be with me all the time. And when he is with me he constantly wants to lick and nibble me (He doesn’t bite). It’s to the point that i can’t even sit down and type this message.

Just wondering if anyone has any insight as to wheather this is normal or what I can do about it.

I saved him from the streets a couple of months ago. He was a tiny puppy and nearly dead.

I am quite busy so I don’t have a lot of time for him. I walk him 3 or 4 times a week when I can. Weekends we go to the park for an hour or two and I let him off the leash and he runs around and meets other dogs.

He is a good dog but I am wondering how to help him with his extreme co-dependancy.