I don't think my snake shows affection so much as he acts very secure with me. He won't ever go over willingly to someone else when I'm holding him.
The latest proof of this (in my mind) is his second shed since I have had him. The first shed went beautifully but this one has been a real problem.
I soaked him for about 45 minutes a couple days ago... he did not like it, but it helped some of the shed work loose. After I let him out I tried to pull some of the shed off with a rag and he was not having it. He made it clear he wanted out of my hands.
I tried soaking him again yesterday, and again he didn't like it. This time when I pulled him out, however, he let me hold him and peel more shed off. It's like he realized that I wasn't going to hurt him, and that when I was finished he would feel better for letting me do it. So he didn't give me any trouble about pulling the shed off all the way up to within an inch of his head!
I seriously doubt he would have let anybody else do that.