How many holes does a straw have?

[Aroura]

I don't see how any answer other than one is correct.

It has one hole, and 2 ends.  Some holes have only one end.

How many holes does a donut have?  One.
A straw is longer, and the edges are thinner, but no one would say a donut has 0 holes.  And no one would say it has 2.

Aha.

But a hole is an interrupted surface.  A straw is a rhombus, which means from any point on a straw, you can travel along the surface to reach any other point.

So what you are saying is a donut has the same number of holes in it as say, a tortilla or a muffin, since a donut is fits the same criteria as a straw.

I don't know where you are getting your definition of hole, but:

hole
həʊl/
noun

1. 1.
   a hollow place in a solid body or surface.
   

By your definition though, only a depression is a hole, if it pokes all the way through, it is no longer a hole but simply part of the shape, I guess?  Actually wait, I can still travel along a hole in the ground, so even a depression isn't a hole.  So....holes don't exist?  Because I can always travel along the surface of every hole I can think of to reach any other point.

So black holes are really giant misnomers to you, I suppose.  If I poke through a piece of paper with a pencil it is also not a hole by your definition?  I have simply turned the paper into a new shape!