REALLY NEED SOME HELP !!!

Okay so I have been talking to the same boy for 4 years now on and off, and we have an amazing sex life. But, I'm getting tired of the normal and wanna do something out of the ordinary for him 🤔.. so I had been thinking about going down on him with ice since he always do something different with me and I just stick to the usual. Any advice on how or what I need to do.