Without you, they are merely whirling dervishes of unrecoverable data.
Without your File System, you are merely some hot and bothered bit stream spinning wildly out of control!!!
While it is OK to fool around with File Systems, one should Never Grope a File System.
One should never grope a file system like a steaming teenager in the back seat of their parent's DeSoto at the local passion pit drive that shows only "bugs, blood and babes" movies that Joe Bob says "check Out", since you really should never treat a file system like that. File Systems Are Your Friend, not blonde bimbo's in cashmere sweaters that you only later on find out are really Ed Woods.
In like manner, you should never Marry a File System, because they do not a proper dowery.
Oh yes, and they all lived happily ever after.