"I lost my virginity when I was 14. And I haven't been able to find it"

This quote by David Duchovny is a humorous method of expressing the idea that virginity is not something that can be lost and found. It is a metaphor for the concept that once something is gone, it is gone permanently. In this case, the speaker is describing the innocence of youth and the idea that once it is gone, it can not be restored. The speaker is also revealing the concept that growing up and ending up being an adult is a procedure that can not be reversed. The speaker is suggesting that the shift from youth to their adult years is a long-term one which the innocence of youth is something that is lost permanently. This quote is a tip that maturing is a process that can not be reversed and that the innocence of youth is something that is gone permanently.