Why does a milking stool only have three legs?

Because the cow has the udder.

I bought a high-priced calculator to do multiplication, but I only used it once.

That was one expensive product.

I was driving on the other side of town last week and I made a quick stop at a small grocery store.

I went in to pick up some eggs, but all they had in the whole store were doughnuts, Cheerios and Swiss cheese. That's when I realized I had mistakenly gone into a Hole Foods Market.

What do you call a bull that's sleeping?

A bull dozer.