Though it may not seem like so long ago that Niall, Zayn, Liam, Harry, and Louis were young, lonely teenagers on The X Factor, today One Direction is four years old. Though their faces are as fresh as ever, a lot has happened since these purveyors of syrupy ballads, deep thoughts, and exceptionally popular fragrances joined forces. In honor of the occasion, take a moment to revisit the real reason to be a One Direction fan: their shameless, male-on-male PDA. Happy birthday, boys.
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