There is a valid scientific reason for this.

Your body requires a certain amount of carbs protein and fat and you are subconsciously drawn to foods that have the proper proportions of these three items.

Potatoes do not inherently have much fat or protein so we add things like sour cream and butter because they are high in fat and then we eat them with steak for protein.

French fries on the other hand is bathed in pure Oil making them really high in fat fulfilling two of our bodies basic needs fat and carbs, we then eat them with burgers that are high in protein. The ketchup has little to do with this specifically however there is a valid reason ketchup is full of citrus acids an acid commonly found in fresh fruits deceiving your brain into thinking you’re eating a healthy delicious fresh fruit instead of a starch filled oil drenched root.

Because they're already filled with lots of fats? Saturated fats at that.

Why don't you?

I like eating my fries with sour cream.

I find poutine to be the superior presentation of the fry as a meal in its own right.

Also, shoutout to lomo saltado, because that shit slaps pretty hard too.

My man... Have you not heard of garlic fries? Just plop some sour cream on those. 🤤

A place I used to go had sour cream and chili sauce fries on the menu.

It is, I'm more surprised that you don't...

Also on the list, any wildcard + Fries.

• Carne Asada Fries

• Brisket Fries

• Fish and Chips (malt vinegar fries with a side of fried fish)

• Gyro Fries

• Poutine (Gravy and cheese curds on fries)

• Hashbrown Fries (Fries with whatever you usually put in hashbrowns)

• Sausage Gravy Fries

• Kimchi Fries (although if the Kimchi "pancake" is on offer, get that)

The list goes on. It's almost easier to list things you wouldn't want fries with and even then I'm sure some maniac would order fries under Sashimi.

You can. Although they're not typically french fries, they are generally thicker cut so you have somewhere to actually put your condiments.

We bought fries today that came with sour cream on them, they were delicious.

nothing’s stopping you but your own fear.

A chain near me called chicken shack serves home style fries coated in garlic butter and I prefer them over standard french fries

When I make steak fries at home, I'll sometimes mix sour cream and hot sauce for a dip.

I know a lot of people who like to dip French fries in Ranch dressing, which is like sour cream with extra steps.

It's pretty common in Canada to be able to order fries with sour cream, green onion, tomatoes, and cheese/queso. (It's the best thing on taco bells menu and they don't even have it state-side)

That being said fries are way greasier than a baked potato, and they are better suited to more acidic condiments (ketchup, malt vinegar, etc)

I think the oil they're deep fried in takes the place of the butter. As for sour cream, I'm not a fan in general so I couldn't tell you.