I remember this conversation perfectly, and it still cracks me up every time I think about it, although it took place many years ago. My husband and I were driving up the California coast to San Francisco at the beginning of a little road trip, and somewhere on Highway 101 around San Simeon, we had this discussion:

Me = me. Duh
DH = Dear Husband (boyfriend back then, but whatever)

DH: (pointing out the passenger window) "Cool; look at those oxen."
Me: (stealing glances at the hills to the east of us as I drive but not seeing anything) "Oxen? Really? Where?"
DH: (continuing to point) "Right up there."
Me: (continuing to look, unsuccessfully) "I don't see them. Do you mean the kind with the big horns?"
DH: (looking at me as though I've lost my mind) "WHAT?!?"
Me: "I mean, how do you know they aren't just cows?"
DH: (looks at me like he's wondering where the nearest funny farm is located)
Me: (light beginning to dawn) "Wait. What exactly did you say?"
DH: "I said, 'Cool; look at those hawks.'"

Miles of hilarity ensued. A little while later, we're driving along in silence when he sees some cows on the hillside and decides to tease me.

DH: (pointing) "Hey, look! Oxen!"
Me: (thinking he's pointing to the birds circling above) "No, actually those are turkey vultures."