ELI5 Donuts - why the association with the police?

Why do powdered donuts feel cold? Why are donuts often associated with the police? Where does the donut come from? How did the hole get invented? ... we explain like I'm five Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: cmonster194, speckledeggs, informationhorder, daracmarjal, liamthebobbitt, zyreal and crazykiahl To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]