I can beat you on that one. I'm almost 55 and up until a few years ago just thought my hair was kind of wavy. Not one stylist ever told me my hair was curly--not even when I got multiple perms to make my 3a hair...3a!
I also don't understand why, when every time I'd go in I'd say something like "I don't want to spend a lot of time styling" (meaning blowing it out straight like they always did after a cut), no one simply said, "Well, your hair is curly. Why don't you do this instead?" What did I know? I was dumb and thought my hair was straight/barely wavy, because they
acted like it was straight! I also thought my hair was coarse for years because a cosmetology student told me it was coarse. It's actually fine.
Former longhair, now CG, living in N. California where the fog meets the wind
3a/b, fine, normal porosity/elasticity, high density
Conditioner wash and style, sometimes with a dab of BRHG.