They are just all different ( trite but true) as our own children were well behaved when they were small ( and older as well) but we had friends who had such badly behaved children they were constantly worried about them, but now as adults, both ours and theirs are all graduates with jobs and families. Our friends were not parenting badly but their children just had different personalities to ours.
it all comes out in the wash, as they used to say!
Twenty pounds ! What will you receive ?
!
I am 69 and he is 5, hopefully he is wrong.
You gotta love 'em though! 
- sounds about right tho, unfortunately ... 