At 65 years old, Harvey Miller still sucks his thumb, and he has no plans to stop.
"Why would anyone want to stop a habit that's free, legal, drug-free, quiet?" Miller asks in the video.
Despite seeing nothing wrong with sucking his thumb, Miller has experienced firsthand how much society can misunderstand it. While his friends and family have been accepting, the habit can attract some awkward looks — even cellphone pictures — from strangers.
Because of this, Miller isn't as public with the habit as he used to be, although he still does it in his car.
"Sometimes, after passing my vehicle, a driver will suddenly slow down for a look," he told A Plus. "I usually stop when that happens."
Once, he recalls with amusement, the passing driver turned out to also be a thumb-sucker. "I'll never forget the look on her face," he says.
In fact, adult thumb-sucking is a lot more common than you might think. Miller runs a website for people with the habit, and he says that when the forum was active it had more than 1,700 members. He even dated a fellow thumb-sucker for more than 12 years.
One of the most interesting thumb-suckers he's encountered in real life? "A cop, indulging in his police car."
Miller sees thumb-sucking as a positive part of his life. He told A Plus he finds it calming, and it helps him with sleep and concentration.
As they say, don't knock it 'til you've tried it.