[Lazy Meatball]

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Seriously, though, invite the person who's tougher to get gifts for. I.e. if you know one dude wants to get a watch for Christmas, or whatever, take the other guy and buy him a watch.

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dudes don't buy other dudes christmas gifts. bring the guy who's more likley to return the favor of free tickets to something you like in return. If neither guys ever get tickets find new friends.