From 1963, please enjoy Roger and his Son by remarkable Polish-French modernist Balthus.

And then tell me the son in the painting doesn't look disturbingly like this MTV icon.

Seriously, I have no idea if Mike Judge had this painting in mind when he created Beavis and Butthead, but the resemblance strikes me as too close to be an accident.
I should also add that there actually is another rock-and-roll connection with this painting -- Bono (yes him) sang at Balthus' funeral. Go figure.