I do wonder:
- suppose he gets his way?
- meets a 40 year old who has no reason to disbelieve his newly amended age per newly amended birth certificate
- they marry, have children
- he retires some 15 years before she expected him to, suffering the health problems common to those of his biological age,
- maybe dies shortly thereafter, leaving her with young children.
Would he have any obligation at any point to admit his true age to her, other than morally?