Oh, no, there are 3 stanzas and it goes “buk, buk, buk, buk...” One night while I was bathing I heard spouse singing it alone without me. I had to jump out of the tub, run out the living room and made it in time for the final stanza.
Hahahaha! There's a sit-com, right there.
Consider yourself lucky that you have a wife who enjoys Robot Chicken.