Grandson: grandpa, what are you reading?
Grandpa: it's a history book, grandson.
Grandson: grandpa, but it's a pornography magazine!
Grandpa: that's right, it's porn for you, a history book for me!
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From @bix
Grandson: grandpa, what are you reading?
Grandpa: it's a history book, grandson.
Grandson: grandpa, but it's a pornography magazine!
Grandpa: that's right, it's porn for you, a history book for me!