The guys of One Direction have known each other for over four years, and they have only gotten closer since their first encounter! In fact, Liam Payne revealed in a recent interview with Metro that he's gotten so comfortable with his bandmates that he doesn't even shut the door when he goes to the bathroom.

This isn't the only strangely personal thing that the members of 1D do in front of each other. Click through to see more, and let us know if you think they're too close for comfort in the comments!

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