Saying that though, by the time my parents were my age I was already approaching my first birthday, so I think they started kinda early. I couldn't imagine having a one year old kid at this point in my life. There's times when I can't even believe I'm married to tell you the truth.
At the other end of the spectrum, a few years ago I went to my best friend's Dad's funeral. My friend is a few months younger than me but his Dad was almost 70 when he died. RIP Rolis, you are missed.