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The most annoying rule
(lemmy.dbzer0.com)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
So is a mug, you can drink from your doughnut using a doughnut.
A mug has one hole, as do a donut or staw. Topologically speaking, the "hole" you put your liquids in is not a hole, as it does not go all the way through to the other side. The handle is the only hole.
Demonstration gif: https://upload.wikimedia.org/wikipedia/commons/2/26/Mug_and_Torus_morph.gif
I think you should go to the kitchen and count them