Normal
I was pondering the very point Akasha made in an earlier post before actually reading it here. We do lose hair all day long, sometimes we aren't even aware that a strand has fallen here or there. Combing through the drain, or carefully gathering each strand from a comb or brush, simply won't account for all of it. All this in spite of the awareness that accounting for dead body parts is of no consequence. That is more of a job for forensic investigators looking for trace evidence. Thanks Akasha ji. You put that into perspective very nicely.