Turn ons?

So my boyfriend and I were fooling around the other day not sexually just jokingly when I decided to act like a lizard lmao and stick my tongue in his ear really quick and then back in and move my tongue. My boyfriend got so turned on and over never seen him get turned over something that quick. So lately when we've been having sex I'll bite his ear like usual but i'll also run my tongue along the inside of his ear. He said that he's kinda liking that feeling almost as much as he likes head. And my boyfriend LOVES when when I give him head. Does assn one else do this or is this just some weird thing me and my boyfriend do haha