I thought one may not wash Netilat Yadayim (for bread) with water that was touched (e.g. I accidently stuck my finger in the cup before washing). In fact, it may be used according to halacha. This leads me to ask, is this a common misconception, or purely my own mistake.
If this is a common belief, where does this arise from?
Is there any opinion which holds that such water is indeed invalid for Netila?