I don’t disagree with the statement that most people aren’t fully developed until the age of 25. But that’s just not a rational argument why it’s bad for someone under the age of 25. Your basically assuming that it will mess with his development.I agree that this is something to consider as a Risk but there is just no evidence to support that this would be the case. I can give you one study though that shows/hints that responsibly messing with your hormones at a young age doesn’t have longterm consequences. This is only one study so I don’t want to draw any conclusions yet,just see it as a hint.