At a certain age your ears have heard enough bullshit and it's time to start enjoying life.

You have moved into the decline phase. You have shot your shot, and you’re out of evolutionary competition.

It's basically your body aging and breaking down, which leads to hormone imbalances and the like. Tons of stuff our bodies do doesn't have an evolutionary advantage, it's just that it's not really a big disadvantage for the survival of your genes.

Unlikely that anything happening when your old is selected for - you've already passed on your genes if you're going to and nothing is helping you do it more.

Untested feature. User is using the product after the End Of Support date.

Keeps the 'skeeters out.

Older people need warmth and avoiding ants crawling into ears?

It's not that logical. It could be a by-product of some other process with some advantage to our species. Or maybe it just happened and didn't increase our chance of death.

It gives us old farts something to talk about, reinforcing the community of elder carers in the tribe, and thus the health of the tribe.

That's bollocks, by the way. All I know is that it's fucking weird when you have to shave your ear lobes.

What happens with your body after the age your ancestors procreated has nothing to do with evolutionary advantage.

Evolution doesn't quite work like that. Traits aren't always selected for/against, we have a ton of traits that we're ambivalent enough about to pass on, like eye color and ear hair. It's neither advantageous or disadvantageous, people are just horny enough that it doesn't matter and gets passed on.

Like most things, it’s an accident, a side-effect, a mutation. And, it doesn’t offer any disadvantage that kills you before you have a chance to mate.

So it continues on, because it doesn’t matter.

Because after the point of fertility, our genetic code is a trashbin of terrible genes. Your genetic code is the product of millennia of selective pressure for breeding, and once that period has passed, we are left with a number of genetic disorders that, as irrelevant as they are to reproduction, become more pronounced.

It's head hair being excreted out yoir ears. Takes time to work its way down, like medival glass slumping.

¯\_(ツ)_/¯

Bullshit filters.

There may not be an evolutionary advantage. Humans have developed empathy to care for each other, so many of us tend to do what we can to ensure that those who may have inherited or developed disadvantageous traits can still live full and happy lives, which also means those genes may be passed on to future generations. Hairy ears, wisdom teeth, color blindness, cystic fibrosis, etc. all may be disadvantageous genetic traits, but this presents the ethical question of if we would rather help the individuals with these genes be happy and reproduce, or if we would rather tell these people that they are forbidden from passing on these genes to protect the next generation from the afflictions (by way of direct genocide, selective breeding of humans, or gene selection and embryo screening).

"The reason is I made it the fuck up!"

--Your body

Tickle your wife's nose as she whispers in your ear?

You’ve recently been bitten by a werewolf?

Perhaps it is an advantage to feel more sensitive with ear and nose hair, while your eyesight deteriorates.

Senescent cells emit growth factors. Hair cells divide. More hair in your ear.

It's just aging. Not advantageous per se, but species' lifespan is adapted to their ecosystem.

Every year my head hair grows slower and my everywhere else hair grows quicker.

It makes you irresistable to women, thus propagating your blood line.

Maybe not evolutionary advantage, but vestigial origin. Maybe a feature that is in the middle of development / disappearing.