Transcription
If you think about it, if women were attracted to men with expensive vehicles, they'd all chase lorry drivers. But a lorry has no status value because it's actually useful.
What you need is a two-seater Ferrari with no luggage capacity at all, and that proves you're rich. If you spend money on something pointless, it's a much better proof. It's rather like rich people have to buy pointless things to show you're rich.
And that's how the peacock's tail works. It works because it's purely decorative and useless. The peacock's tail is a deliberate display of spare resources by a male peacock which is attractive to peahens. It says, "I'm so genetically fit as a bird that I can still function while carrying around this ludicrous thing on my back purely for decorative purposes."