simpleton

Reader's Digest 7/8月号の記事 'Laughter the Best Medicine' からの引用です。
A broke guy walks past a pub. He looks at the door longingly, but since he has no money, he walks on. Just then, he spots a lamp lying in the gutter. He picks it up and rubs it, and a genie emerges. "I will grant you three wishes," intones the genie.
"Give me a bottomless mug of beer," the guy says. A mug of beer appears in his hand. He takes a sip, then another. With each chug, the mug magically refills. "And for your other two wishes?"
Between swallows, the lucky guy shouts, "Give me two more just like this one!"
おめでたい人ですね。
でも、よく考えたら余分なマグは売ることもできますよね。