My sex life with my boyfriend is very freaky but how to make it more?!

Okay this is a little graphic but anyway, me an my boyfriend have a good sex life we have sex everytime we see eachother so 4-5 times a week, an up to 5 times a day long sessions sometimes. We do anything from dirty talking to each other, calling eachother dirty names like he'll say "call me daddy" or pull my hair an say I don't want you catching anymore attitude with me an it's the biggest turn on, we do every position you could think of, have sex in the kitchen, car, shower ect. We even eat each others ass (no judging) we've been together for a long time now since we were 16. Anyway we do have a great sex life but I want to surprise him with something new like I don't know something that'll really get him turned on any tips?? Or things you do in bed that turns your man on