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This is like 75 cents. Problem solved. If he wants something he'll probably just buy it for himself anyway.
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Everybody likes comic books. Hellboy is pretty good. It's fast to read and you can re-read it a few times a year without getting bored. Mignola is a master.
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Toilet paper is not very exciting to unwrap. However, he'll probably use it more than a pair of Aldens. You poop every day (and if you're civilized, you wipe; unless he's sprezzy, then definitely not). You're supposed to rotate your shoes so he won't wear those shoes every day.
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Crisis On Infinite Earths is great. It sets up the entire DC Universe that we now... wait... Barry Allen is alive again? So is Hal Jordan? Never mind, this is a waste of money.
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You can get the entire Bone compendium in paperback on sale for, like, $30. That's stupid cheap. It's enough comic book to last a long-ass flight.
Oh, you wanted some clothing recommendations?
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Buy him some socks. He has too many fuckin' clothes anyway.
Merry Christmas.