It gets easier as the years go by. It's during the early times (first year) it's a little tough, usually trying to beat back the buzzards that try to swoop in once they know your single. Thereafter, not a big deal, in fact you'll meet some very nice people that have "been there, done that" as the saying goes and your automatically welcomed. What you do from there is up to you.
As far as "the question" (the how come you are D), mine is straight forward matter of fact "Age 42 depressive menopausal midlife crisis". Typical response "Oh, THAT". I rarely have to explain more.