Im 22. But i met another guy with an fz8 in town who was in his 50s. I skipped the super sport faze like most people go through. I went straight to the naked bikes.
I am 21 (22 in July) and I love my bike. I kinda skipped the super sport thing, but sometimes wish I could ride one just for fun. I am young, however I have been riding motorcycles since I was 6 years old. So no you aren't the only young one. Although I have been wondering about this same topic so thank you for bringing it up.