Mystery Language

I can take off my head and so can my dad
In the grocery store, it falls onto the floor
We laugh about it sometimes
Just take it up to the counter
Pay for it by the pound
I got the money in my pocket
I found the money on the ground
Bdellium, onyx, gold is there
Pick it up and put it down, just like a head
‘Cause I don’t need it
I am filled by your mystery language
I open my throat and my ears clear
I can hear the blood and the ocean
Take off your shirt
Lift up your skirt
Take off my head
Put it in your bed
Speak to me in your tongues of fire