Baloney! I'm not going to argue language with someone like you any longer. The definition of adultery is clear and unambiguous and applies to everyone who participates regardless of their individual marital status or gender. You can make up any definition you want if it helps you live with yourself, but your Clinton-esqe word weaseling certainly doesn't make it right.
Is it that hard to admit that you are wrong, or that there are older, more precise meanings for words that you were previously unaware of? If so, I pity you.
Among educated people this is called learning. It is a wonderful thing. You should try it some time.