Vice: it will be something to remember in old age
Oi.Zo: In old age you will remember where put glasses

???????????

I try to explain. The expression "but will remember that in old age" is used as an excuse, usually by women, for their behavior, some not quite moral acts.
Interlocutor in response reminds, that in old age shalt remember the adventures of youth, but where to put the glasses or false teeth.

Got it, mate. Pretty funny.