Bert, you've got one big blue clicky thing there!

Surely it depends how it's done. Art is absolutely full of great parodies - think of the vast number of Punch cartoons which often use famous pictures or scenes to lampoon politicians (most famously the Rake's Progress series). Spitting Image used to do songs for their puppets (mostly political), which often used existing tunes. Films can lampoon other films (Airplane series). So why not music? Surely it just comes down to how well it's done. If you don't get the point of irony, then you're unlikely to find anything amusing in parodies, but then you're unlikely to find many songs amusing, particularly those done in the British tradition which uses irony a lot.

Of course, it's entirely possible to write a parody which isn't very funny or insightful, and it's equally possible to write a malicious one whose purpose is obviously to "get at" the original author, but equally it's possible to do a funny and original take on an idea, gently mock someone with it (not necessarily the song's author), or to use a tune for a purpose it wasn't originally intended for. Think of Tom Paxton's "Forest Lawn" - "Rock of ages, cleft for me, for a slightly higher fee".

Grab.

Grab.