Other times, Jazzy lets him chew so hard on her neck that she gags and does nothing. THAT upsets me, and I always pull him off. He is relentless.
Same at my house with a 6yr old and 6month old. It is the challenge for the alpha position. And I believe there is an adjustment for the young ones with a full set of big teeth learning bite sensitivity. I have noticed Cairo now immitating the little grooming bites that Caesar used to do to him.
The biting and choking must be okay or the adult would stop it. I thought it was just Caesar being sweet and taking it, but it sounds like you are all experiencing the same thing.
A soft muzzle is fantastic for this type of behavior. Normally they both play. But in the evenings, Cairo is just too much with that second energy spurt and all Caesar wants to do is sit with us on the couch. The soft muzzle freezes Cairo like a stone. Once he stops sulking and he finally sits or does a down for me he will come back with kisses for everyone.:p I find that he will have to immediately pee after the muzzle comes off becuase it stresses him out (FYI).
Also, Cairo goes to bed at 9pm every night and Caesar gets to hang out with us and gets a break.
I call it the acting like a 2 year old syndrome. Cairo is fighting sleep and gets ultra pesky.