For the most part, this is really good and natural sounding English! Very good, only some slight corrections:

Why does shampoo smell like food?

I don't know how it is in other countries, but here in Argentina, almost all varieties of shampoo smell* like food. And I find* that disgusting. I don't have *a better idea as to how it should smell*, and I know it's not very useful* to complain about things without proposing something better, but that is exactly what I want to do. Smelling shampoo makes me hungry, and that's (*you could say, "and i find that repulsive*) repulsive! Again, I don't know how *it should* make me feel, I *just* think smelling shampoo should put you in a washing-your-hair mood. *It certainly shouldn't* make you hungry. Just (*you can remove "just" here if you want*) think about it. You go to the store and decide to try a new shampoo. So you open a few bottles, you smell them (do you do that when you want to buy a new shampoo? I do), get hungry, forget the shampoo and go get some food! It's not profitable for the shampoo companies! And you still have to use a food-smelling thing to wash your head, which is disgusting! Imagine you are eating something tasty, and you are enjoying it. Would you put that in your hair? I wouldn't. The same thing happens with deodorant. A few years ago, a chocolate-smelling deodorant was on sale here in Argentina. And I thought it was a very good scent, for a cake! Not for a deodorant spray I would spread over my body! I am not a cupcake, I don't want to smell like one.

That's all for this note. I'm practicing my English, so I *would appreciate* any corrections or comments!

Why does shampoo smell like food?

I don't know how it is in other countries, but here in Argentina, almost all varieties of shampoo smells like food. And I found find this that disgusting. I don't have much any better ideas about how it they should make it smell, and I know it's not very usefull to complain about things without proposing something better, but that is exactly what I want plan to on doing. Smelling the shampoo in Argentina makes me hungry, and that's repulsive! Again, I don't know how it should it make me feel.  I think smelling shampoo should put you in a washing-your-hair mood, but definitely should not make you hungry. Just think about it. You go to the store and decide to try a new shampoo. So you open a few bottles, you smell them (do you do that when you want to buy a new shampoo? I do), and you you get hungry, and then forget about the shampoo and go get some food! It's not profitable for the shampoo companies! And you still have to use a food-smelling thing to wash your head, which is disgusting! Imagine you are eating something tasty, and you are enjoying it. Would you put that in your hair? I wouldn't. They even do this same thing happens with deodorant. A few years ago, a chocolate-smelling deodorant was on sale here in Argentina. And I thought it was a very good scent, for a cake! Not for a deodorant spray I would be spreading over my body! I am not a cupcake, so I don't want to smell like one.

That's all for this note. I'm practicing my English, so I will appreciate any corrections or comments!

That's why I don't wear deodorant, and the same reason why I don't have any friends!!!