It's a bit strange to hear people laughing at these lines, as I've played this song thousands of times, but usually in front of audiences who have already heard, memorized, and tattooed these lyrics on their hearts and souls. I like that they have done this, but such punchlines only work the once; after that, the performance is largely ceremonial.
I will say that when I have done it in front of people who haven't heard it before (school groups, fancy literary conferences, Supreme Court Justices, Tesco Vee) it has never failed.
... and on the covers playlist it goes.