Look, let's get this straight. Trevor can play some guitar - floorspot level, although he would be better with a better guitar. He can sing in tune (largely) but his voice is not particularly melodious. Sue's timing and pitch are entirely random.

But the material can be very funny. If you find the irony of the 50s/60s rebel now being senile enough to have no bladder control too senstive to be funny, I regret you are being too PC.