Is it normal to write sexy and dirty contents to wife?

It was my first experience to leave behind wife for a week. I was on company's duty. My wife was busy with her own job, so couldn't accompany me. First night I called her on phone and we had a long love talk. Next evening while sitting in my hotel room thinking what she would be doing right now? I emailed her in most explicit dirty words describing my horny state of mind. Later I repented why did I do it? During late night I was surprised to see her equally hot and sexy response. She even attached her nude pics, asking for my pics. I did it readily. The next six evenings we spent by sending and receiving full- of- sex mails with naked pics. Was it normal?