Hmmm well my experience yesterday.
  I ride a monster - My son Jase 19 rides a monster - My daughter Tiff 16 is mad about Ducatis - Both monsters were used in DD this year so I no longer have pillion pegs but Jasons has been put back to standard hangers so yesterdays ride out saw myself on Max - Jason on his with Tiff pillion. 
 I can say I wasn't a happy mummy really - If they were behind I was constantly watching his overtakes, if he was in front I was watching everymove - He did one overtake I would have considered 'slightly dodgy' and as soon as we got back his first words were ''yes i know'' but Tiff confirmed it was the only one and he only seems to make any mistakes at all when i'm following. 
 I also have a 9 yr old - legally she can also go pillion now - will she ? Not a hope in hell as far as i'm concerned just yet - to me she's too young - but so is my 19 and 16 yr old !! 
 In some ways it was nice us all out together enjoying a shared hobby - but I have to confess it's a major worry for me despite Jases excellent abilities. 
 Tis not right having 2 of my kids hooning around the countryside on 2 wheeled death machines 
 
  On the other hand - i'm a riding instructor but couldn't bring myself to let my daughter off the leadrein to teach her how to canter so had to send her to a riding school and leave her there !  

 Tis not easy at all !