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A straw is topologically the same as a donut. It absolutely has one hole.
Doughnuts don't have holes, "donutholes" notwithstanding. A doughnut is a torus. If you poke through the side of a doughnut, then it has a hole.
Take a pancake. Put a hole in it. It's now a torus.
Sure, but it's a pancake with a hole in it. Pancakes ought to be disks (which is, topologically, a squashed sphere).
If you put a hole in a doughnut it is no longer a torus. A hole deforms the manifold of an object.
Just realized humans are topological donuts
Dude your mom’s a topological donut
If Gordon Ramsey were a cartographer…
You guys are all getting down voted and this misses out on the pure entertainment value of these comments
Thought so, donut.
Almost. First you need to choose the minimum size of a hole. If you define a hole as something just a bit larger than skin pores, a human has 7 holes. Even when defining a hole as something around 1cm, you have at least 3 holes (your nostrils, mouth and anus share one cavity).