The licking would use a lot more battery power than driving a speaker, so it should probably lick when the battery is strong, not when it is getting low.
So, I could in theory; get a rim job from an AirPod in this scenario. It must be said— free rim jobs with your purchase of 250$ headphones would be a fantastic investment.
— probably best to get an extra set in this case. I don’t need shit in my ears.