If you take “job” to mean “doing a thing in exchange for another thing”:

Allow me to narrate a brief historical reenactment:

Caveguy:

dragging cavedeer carcus somewhere

Cavegirl:

happens upon the scene

grunting (translation: damn that venison lookin’ tasty af)

Caveguy:

grunting (translation: it’s mine you can’t have it)

Cavegirl:

grunting, but seductively (translation: well, if we smash, can I have some?)

Caveguy:

aroused grunting (translation: hell yeah girl, you can stick around, I’ve been having the worst dry spell)

_fin