It's usefulness in the dictionary isn't in question in my opinion... Hell, there is even an entry at
Wikipedia (with illustration). The crazy thing to me is why this parent thinks it is so damaging for her kid to MAYBE be exposed to the definition in a book with 1000s and 1000s of other words defined as well. Frankly, if the kid is looking up oral sex then the parent other things to discuss with their kid besides where they found a definition. I'm actually somewhat impressed the kid actually looked it up. Good thing they didn't do a Google search for it or else who knows what they'd find. Thankfully, the dictionaries have been removed making it more likely the kid will do that Google search. I'm waiting for the schools to ban Google and Wikipedia... Any bets on how long that takes?