There are probably many downsides to this way of life, most of them won't trouble me, but today I remembered one of the downsides which I had previously recognised and forgotten.
In one relationship, holidays were very important to us, we both enjoyed travel, and had travelled plenty before we met. We realised, somehow we were missing out on something as we couldn't reminisce about our previous travels as they had been with other people. We started to play a game, when we spoke about previous holidays, we imagined...pretended we had both been there, and added us to the story. 'A' would say, do you remember Malta, we had a great time but you didn't like the boat driver, I would agree. A knew that had I been there I would not have liked the boat driver. I might say, you liked Iceland but didn't like the lack of alcohol....we could then play along for a while, talk about the holiday together, it was an ok game to plug a gap we had found.
Today I have realised that I have so many memories, of so many places, visited with a variety of people, it may just be one of the things I envy in happily married couples, they can reminisce about their favourite times, and the times belong to them both.