Both OH and I have been married before and we often talk about our previous experiences - then we have a big hug and thank our lucky stars that we got through them and found each other! But seriously, the years we spent with other people are part of what has made us "us" and I'm very happy that we both feel secure enough in our relationship not to have to think twice about what we can and can't say to each other.
(I might not have phrased it exactly right there, but hopefully you get my drift ....)
To think that London, or anywhere else for that matter, does not belong to any one demographic