I think I would prefer it the other way around.
Growing old up is mandatory, growing up old is optional.
I disagree completely.
First, what use is living, if you can't have a youthful outlook?
Secondly. What is the alternative to growing old?
Growing dead?
Yeah, but yer under 30.
Us over 60’s would really, really like our under 30 bodies!
If we could get both optional, now yer talkin’!...