The phrase "a certain age why" is not correct and does not make sense in written English.
It appears to be a fragment that lacks clarity and context, making it unusable as it stands.
Example: "I often wonder about the reasons behind the choices we make at a certain age why we feel pressured to conform."
Alternatives: "at a particular age" or "during a specific age".
If evolution cannot help us after a certain age, why should we not help ourselves?
Inkster was asked a question commonly posed to women of a certain age: Why try to compete with teenagers and 20-somethings?
Walk the streets of Crenshaw, in the heart of black Los Angeles, and ask residents of a certain age why they joined moderate and conservative white voters in the suburban San Fernando Valley to elect James K. Hahn their next mayor, and the answers can sometimes be blunt.
Just because they're a certain age, why does that matter?
If people under a certain age wonder why the Kennedy assassination continues to be such a preoccupation for so many, the hundreds of traumatized faces that flit through this program should make it clear.
"Men of a Certain Age," TNT: Why is a canceled show on this list?
If you're of a certain age, and wondering why you never got those acid flashbacks you were supposed to, go to Mardi Gras World.
The latter might be why celebrities of a certain age choose fringe.
Depending on why women over a certain age are denied access, the introduction of in vitro derived gametes as one type of ART might change this status quo: for example, if the policy is based on concerns related to scarce resources (oocytes) or exploitation of egg donors.
Single guys of a certain age who are looking for someone fun say: 'Why can't I find a girl like that?
As a union organiser at the BBC, you'd hit a certain age group below 35 and [employees] go 'Why should I join?' says Paul. "And then, over 35 they go, [knocks on table] 'Hi, I've just joined, how do I join the union?' There's a total break.
