Why does mine stink and hers doesn’t?

I can just hear some of you now. “Tom, are you turning to adult-oriented content?” Of course not, but this seemed like an attention-grabbing headline, so I took poetic license. Actually, this little ditty was motivated by a conversation I overheard at a local bar. Two women next to me were complaining about the chlorine smell in their water. One of the conversants commented that her water always smells of chlorine while…