[NSFW] Question reprise: How much past intimate info do you share with your present mate?

It has been some time, so I figure we can revisit this question because there are new Flutheronians that might impart a fresh view of it. How much info should one share of past intimate relationships they had before their present partner, be it with hookers, if they were hooking selling their own self, people they were in relationships with, transgendered, working in the porn industry, etc.? If they were asked and not offered, should they answer? If they answered is there anything to gain?