You're right! Its not a kink for us. Its a lifestyle and my wife is only attracted to black men, but wants a cuckold for a life partner and responsible father.
It's tough to lick balls during the in and out. When he pauses, suck a testicle down or suck up and down his vas def getting it to pump. It feels good to him. I like to eat his taint and ass during a pause too.