There are people whose voice until old age sounds young - you do not see who is speaking, in life you will not think that it is an old lady or an old grandfather. My grandmother, for example, had this. She taught and read lectures to large audiences before her retirement - maybe a professional feature, or maybe, and purely anatomical, I don't know.

In general, the grandmother was already under 80, looking quite cheerful, but the first changes in the brain have already begun (if you haven't seen it - I'll explain: they start slowly, smoothly and with short attacks, you can not notice the mess for a long time until it takes large forms). One of the fun was to complain to interlocutors - neighbors on the bench, sellers, hairdressers, etc. The terrible relatives and their evil deeds.

In short, it turned out that even in the frank nonsense, clearly contrary to reality (we did not visit for six months and went to America, and grandmother was dropped, although the neighbor Nina Pavlovna, who is told of this, personally drank tea with me yesterday), easily and readily believe if it is not echoed by a classic whistling old lady's voice, but a vivid and almost virgin.