I can’t think of any benefit in sharing how many people you slept with before meeting that most recent person you started seeing. This is of course especially true, if your body count is alarmingly high. What purpose would disclosing this information serve, and how would it make your connection better, unless your new partner is very religious and this information is extremely important to him or her? The only other reason you would want to share your colorful sexual past is just becuase you want to be as open and honest as you possibly can be. But do you really have to volunteer this information? Most likely not.
But, what if the person you started seeing is asking you about the number of partners you have had? They may or may not be able to handle the truth, even if they assure you they can and encourage you to be completely open and honest. And, ironically – they more they like you the harder it will be for them to handle them learning about your high body count. This is just our nature – they more we like someone, the more possessive we become about who they are.
You then may wonder if it’s any of their business at all to ask you such a personal question. However, if you get to know each other better and become closer, it kind of does become their business. The best way to address this question is to be “strategically ambiguous” and respond with “like most of us, I have had my share of experiences, some of which were better than others” but without putting an actual number on your “body count”. While this might not be the most ethical way of handling this question, it might just be the most pragmatic – an effective way not to ruin a promising connection with someone you really like over information that really has no relevance to your present relationship.