I was thinking six myself ;-p

I do try not to take their hands, remind them to do their coats up etc when their friends are around.

Fortunately its well known that all parents hit senility just as their kids become puberts, they just sigh at me indulgently whilst sharing each other's pain.
I believe I can be expected to recover slightly when they hit 30 so I'm hoping for a couple of good years before I go permanantly gaga.