Back in your grandparents day, before Candy Crush and Instagram, there was only one thing to do in a public bathroom: write jokes on the walls. Thankfully, this tradition still exists today, and these are some of the best responses geeks have left in bathrooms all over this beautiful world of ours:  

1.

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via BallsMcWhoppa



2.

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via ColeSoryy



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via Ryno3639



4.

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via RamboAz



5.

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via bubear13



6.

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via equaliberty



7.

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via NTrun08



8.

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via cheezburger



9.

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via drollnation



10.

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via Chistes para ingenieros



11.

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12.

undefined via NerdCRAFT 



13.

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via KingSpartan15