Couple examples from personal experience:
Spicy Food
I didn’t like spicy food for a (relatively) long time until I was 25.
2/4 of my roommates did. We’d order two pizzas, one spicy and one not. But the asshats who liked spicy would eat half the non-spicy pizza first knowing the other one was safe from us.
Well… we’d see about that!
I bought a jar of pickled little yellow banana peppers. At first all I could manage was a tiny little bit of one. But I had that tiny little bite every evening, every day. Eventually my tolerance grew until I was eating a whole one, then multiples. In a few weeks I realized I was crunching through them and loving it. (Didn’t love the first time I overindulged and found out what goes in can still burn going out, oof, lol.)
Beer
First time I had beer I did the movie-style stereotypical spit-take. Tasted like something I’d never want again. I drank when I was 18-19yrs old but it was usually Smirnoff Ice or some other “bitch-pop” as was said at the time by those around me.
When I was in my early 20s I supervised for a company that had us do a lot of traveling. Particularly three months of the year I was in a hotel more than at home.
There was a consistent crew of people who lived in a town nearby that I saw fairly frequently for those three months but not too often elsewise. As I said I was in my early 20s, 21-23ish. And they were in their late 20s to mid thirties.
They were inveterate drinkers, and they loved beer. And they undertook a self-imposed mission to teach me to love beer too. Them being older and me being impressionable, I went with it.
Every evening after work we’d hit up the local pub and I’d order three beers, based off their recommendations. One was an inveterate drinker as mentioned, the other a mid-thirties redheaded British woman I grew rather fond of and who was rather fond of me, along with some other crew. Basically, people who knew beer and in the case of the brit, someone who I would’ve listened to for a few reasons.
Didn’t take too long but I certainly “acquired” a taste for it. Eventually acquiring my own preferences to the point I was recommending them ideas.
I’ve tried so hard with celery and onions. Turns out I like the flavors just fine, it’s the textures I can’t handle. So I just have to chop them up into the tiniest pieces so they don’t squeak when I bite down. Food shouldn’t squeak when I bite down.
A squeaky onion is an undercooked onion imo, same for celery and carrots. I give those vegetables a big headstart on everything else. They’re basically impossible to overcook and their best flavors come out when they’re soft through and through.
I love onions and prefer raw onions on burgers and sandwiches. I usually snack on them when I’m cutting the onion. But I absolutely can’t stand raw tomatos or pickles.
The cheese curds in poutine must squeek when you bite down.
I prefer them melty from the fries / gravy. I hate when it’s just a hunk of unmelted ass cheese.
Some melted, some hunk of unmelted ass cheese is the way to go.
I still barely fuck with raw onions, but grilled onions are great, and were the gateway drug to my appreciation for Onions in general. When I was a kid, I’d pick them out of everything. Had a burger unknowingly with grilled onions. Shit changed my life. Started to appreciate the flavor and even incorporate it into my cooking. Now, most things I cook have onions in them in some way, shape or form.
Onions can have all kinds of textures and tastes depending on the type, condition and cooking method you use. Try raw red onions in a salad or caramelized for half an hour to put on a burger. Also I suggest removing the first layer (after the skin) as it’s often tougher than the rest.