Imagine that scientists find out that some compound intended as a treatment against cancer activates cells in a very unexpected way: it reverses growth and puberty. After initial testing and authorizations, a clinical trial with humans is run.
The drug would take 3 years (faster than natural puberty, since it would be at work at full power 24/7) to undo your puberty and bring you back to the stage of a child just about to enter puberty. Then you would be allowed to go through puberty again, though this time, of course, you would be allowed to have the right hormones doing the work. The new puberty would go at a natural rhythm however, so it would take at least 4-5 years to mostly complete; almost twice that to be completely done.
Now to negate the eternal life/youth aspect of this situation, let's say the process can only be completed once, and that instead of going from child to 20-year-old, you'd magically go from child to your current age's aspect. So it's weird but if you're 60 years old now, you'd at the same time be a teenager and getting wrinkles. Though to be fair, it would bring you back to your age when you started, not you age plus 7+ years, so at least aging would be paused in this process.
Would you do the clinical trial? And how would you manage the fact of going back to being a child for a few years? And how would your friends, family, lover, work and/or school manage it?
As for me, I think I would do it. Even if it made me literally lose years of my life. Even if I know I'll probably pass just fine. I'm just a perfectionist like that. But just like genius children can attend classes for people much older and even in some cases university, I think I would sort of be fine. A company CEO or prison guard might have more trouble though.
PS: What the heck is this, you can't add a poll when editing a message, or delete it to remake it with the poll?