Freak stuff

So I’m into freak stuff. Like being held down or choked or told what to do (to an extent) and small stuff like that but how do I hunt to my boyfriend I like it? He was messing around with me one day and grabbed my neck because I was saying I was going to beat one of his friends up (joking around of course) but then he stuck his arm out and grabbed me and said “don’t talk to him like that” and let me go. I liked it a lot but I don’t know how to hint to him more.