a blonde goes to buy a tv

A Blonde goes to buy a tv and the shop keeper "says no because you are blonde", so the blonde goes home and dyes her hair brown.

Then the next day the Blonde goes to the shop again and says "can i buy a tv" the shop keeper says "no because you was blonde", so then she goes and shaves all her hair off.

Then the next day she goes again and says "can i buy a tv" then again the shop keeper says "no because you was blonde" so the Blonde says "how do you know" and he said "because these are microwaves not tvs"