Flash, yes old man.
17-37 = 20
37-55 = 18
so yes, you are over the hump.
For youngsters aged 17 a 32 year old, almost twice their age, is positively ancient. A nephew, aged 29, was rejected by the RAF Regt as far too old. Ditto the Army although he could have been a driver in the RLC.
Me? I am over twice Old and Grey's age although not grey yet (what's left of it).