I have CPTSD and social phobia/avoidance.

On dates, is it common to ask about your past dating history? If so, what do I say? How odd will my abstinence from dating, and other social things, be seen?

Please be honest even if it's a hard truth to swallow. I realise that in my age, people are starting to settle down and the stakes of what makes someone an attractive partner are raised because of that, so I can understand if it looks pretty bleak. The reason I ask is to be prepared and accepting, while doing my best of course.