An apostrophe shows ownership, i.e., the neck tie’s knot. Otherwise, it is neck ties.
Whadda you know!!??! Being a grammar Nazi is fun.
You're right, but I see improper apostrophe use all the time. It's a doofus world.
Nothing doofus about the apostrophe. It completely changes the meaning of the word. There's a big difference between possessive and plural. You need to say what you mean. Our modern schools are turning out a generation of illiterates.
And proper in this case is neck-ties, without the apostrophe. The neck-tie "posses" nothing. It's akin to using "caliber" to denote the cartridge a rifle is chambered for.