Hangers-on

Tonight I was cleaning out a few closets, trying to get rid of a bunch of old stuff in order to pare down the clutter, when I realized I have about a thousand hangers. Where did they all come from? I distinctly remember, about 2 months ago, dumping any remaining metal ones along with some cheap, about-to-break, dollar-store white plastic ones, as well as an entire Trader Joe's bag full of more plastics in curious, 70's-style colors: dusky blue, dark brown, a purple shade that didn't know what it was: it seemed to ask itself, "Am I violet? Am I pansy? Dare I be... Palatinate?" I have not bought more since. Are they breeding?