Congratulations, you have a normal young kingsnake.
If you persist with handling - especially as you say he settles down after being gotten out - he will eventually learn one of two things:
1. You're not going to eat him, so he doesn't need to musk/etc you.
2. Musking/etc doesn't stop you from handling him so it's a waste of effort.
"My bum has been a bum for a very long time, but that does n't mean I have to listen to what it says."
- Terry Pratchett, Fifth Elephant