Because most pickles are sour and since your socks are touching the ground and the cotton molecules pick up dirt even when not worn they taste sour as well.

You go out side to the grave with dirt on it and dig it out with your shovel

you go to the graves and the one that has dirt dig it up with the shuvel and you will find it

Yes. Many people in the south eat sour dirt or clay dirt. The dirt is dug from deep enough in the ground that it should not be contaminated. I eat it every day and have done so for the past 11 years.

Some compound words that start with the word 'sour' are sourdough, sourpuss, and sourgrass.

Some terms that use the adjective 'sour' are sour cream, sour grapes, sour apples, and sour milk.