Always tip your servers. Otherwise, you might end up with one of them turning into a twisted, slightly toxic caricature who provides your morning coffee or afternoon beer with a side of venom.
Both Gunther from Friends and Moe from The Simpsons are harmless creatures really. They've got big hearts, they're invariably dependable and they will come to the rescue whether there's a car to be fake stolen or a cat to be bought for way too much money. But they're also both definitely in love with one of the main characters of their respective shows. To a fairly dangerous level.
Both are destined to forever live on the sidelines, taking rare opportunities to profess their love, while silently criticising the men their beloveds end up choosing to be with. But that's part of their charm.
And because of their characters, they're both some of the most quotable, sacrastic characters in their shows. But who said what?