Both my parents are alive and I am 60.
It's an interesting question but reminds me a bit of those questions that people warn about on MN and Facebook such as, what's your mother's maiden name or your dog's name? People are always advised not to respond because they are fishing for password info. Lots of people use their parents' birth years as PIN numbers etc.
Sorry OP, it was just a passing thought and it's an interesting question!