What everyone else said, I'm 63, first bike was a Norton 750 Atlas in 1966. Which at the time was one of the 'big' bikes, at that time if you had a bike that would do the 1/4 in sub 12 seconds most likely you were taking it to the strip on a trailer with no lights, muffler or other street trim.
When I got my 919 it was the first bike that I didn't get on and hammer the throttle. It still amazes me how fast it is with mufflers, turn signals and full street trim plus it's not even considered a really fast bike today. . Sit down and watch some youtube videos containing fast bikes and fast cars, when things go wrong they go wrong FAST.
My son wanted to ride when he was 20, first 125 dirt bike, 600 Ninja, 600 Yamaha (forget the designation ). Now at 28 he has a 919, figured he'd buy one as he kept borrowing mine when he wanted to ride two up because he found it more comfortable than the crotch rocket ergonomics.
Excuse the babbling, with the 8 years I spent working at the bike shop just too many incidents that I witnessed. Being a father I still worry to which I'm sure you can relate.