I once worked for a boob (for a very short time) who said the following......

(after getting grilled by a customer about he complexity of modern electronics) "Well sir, some people just shouldn't own audio video system"

(after selling a system to one of his friends who subsequently found that it wasn't working correctly and requested a service call)

"Billy, you're my good friend and I love you to death, but the world doesn't revolve around you"