The recent jocular spat between Winston Peters and Prime Minister John Key over who's been dunking their locks in Grecian 2000 has been noted with interest by this observer of such trifles.
For males, the giveaway is usually the hard-to-cover sideburn tideline. Just as the ocean's height depends on the phases of the moon, so silvery tidelines rise and fall, according to the frequency of the user's cosmetic whims.
I have a number of photos of prominent citizens in my little black book, in case I need to update their caricatures. Clearly, some appear to enhance their thatches, presumably in a desperate desire to deceive their fellow citizens that they're still wallowing in the fountain of youth.
I note that the Prime Minister joined my collection a couple of years ago and I guessed that, like many past leaders, he was reaching for the Grecian 2000.
However he has denied in Parliament that this is the case, making my cynical assumptions questionable.