How would your partner know if you ever had sex?

Because you told him: Honesty is best. There is really no easy way for them to tell unless they are very well trained wth very focused and intense exam.

She wouldn't know: Partners find out about past sexual activities because they ask one another, and they tell one another. It is the spring of 2012 here on earth, so if whether or not a partner has had sex before is a secretive issue, likely there are bigger problems in the relationship other than sex. If two people care a great deal for one another, then talking honestly is a good thing!