Still doesnt explain why Dick has aged more than Batman though!
Did he?
If Dick went from being, say, 15 to 22, I can accept that. Meanwhile, Bats aged from 25 to 32. A decade of age between them can make a lot of difference in how much they physically age.
What's funny to me is that, while Bruce is only 10 or so years older than Dick Grayson, adoption services saw no problem with that and let him adopt. No one ever brought it up.
