Chemistry humor

My daughter is taking chemistry this year, and something she was talking about reminded me of something happened on my wedding day. We were standing under the chuppah, and the rabbi, a genial older fellow who barely knew Ronnie and didn't know me at all, was giving what I presume is his stock wedding speech. It was filled with pearls of wisdom like, "Remember that 'united' and 'untied' are made up by the same letters; it just depends on where you put the 'I.' Then, in talking about the special bond that is marriage, he compared it to chemistry. How hydrogen and oxygen by themselves are gasses that go their separate way, but together they make water, without which life cannot exist. At which point my great friend Bennett whispers in my ear, "Yeah, but it takes two hydrogens to satisfy one oxygen."