I used to have them as a kid, even long stretches that prevented me from sleeping. I don’t remember having hiccups in the last 15 years. It just stopped happening at some point.
I once met a guy who said the same thing and was convinced that this was the usual case, whereas me still getting them as an adult was very unusual (this came up when I got them, apparently his first time seeing an adult do so).
I learned diaphragmatic breathing pretty early in childhood. Later, I noticed that whenever I got the hiccups, taking a deep belly breath early on, usually within the first two or three hiccups, would make them stop. Over time, I learned to do this unconsciously, so nowadays it's basically a reflex as soon as a hiccup starts. Since then, I haven't really had any hiccups longer than one contraction.
I used to get hiccups often, but acquired the ability to will them to stop in my teen years. Since then it's become an automatic reflex that when something triggers that first hiccup, I "do the thing", and there's never even hiccup #2 ever since.
Have a friend who has never had a headache!
That is insane to me, as someone who suffers from chronic headaches every single day.