I didn't mean that. I meant in the movies. Dana Andrews was well into his 20s and maybe his 30s when he made State Fair, but he was referred to as a "boy". They did that routinely in the mid-20th-century. In popular songs too.
I loved the movie “State Fair”. My elderly mother often talked about her youth and how the local state fair was the “social event of the year”.
That was during the days before television, malls and middle-class vacations.