If you say even the most mundane word enough times it can begin to sound nonsenical. Perhaps the folks having conniptions over the use of the title word of this entry in a Newbery-awarding-winning children's novel haven't said it enough. Given their objections, they might have avoided saying the word at all.
If you're clicking over to read the New York Times article linked above, you'll be able to take advantage of a new technological trick, double-clicking on a word (the trigger actually varies from browser to browser) to get a pop-up window with dictionary definitions and other references. Here's what you'd encounter for "scrotum":
The musculocutaneous sac that encloses the testes and is formed of skin, a network of nonstriated muscular fibers, cremasteric fascia, the cremaster muscle, and the serous coverings of the testes and epididymides.