My dad had me on the back from a young age. I always wore a full face, gloves, jeans. Can't remember if I had a real jacket or boots. I must have been 7 when we started, I think.
I had problems with getting too comfy. The bike was something we rode all the time, so it wasn't exciting after awhile. I wound up falling asleep on the back of his 1100GS a lot! Eventually he had to tether me to him to make sure I didn't fall off.
1986 BMW R80