Junk food evokes Positive feelings.

It is true. The ingredients in many junk foods literally explode on the tongue giving a very pleasant sensation to the brain. It is a combination of science and marketing. One can enjoy junk food if taken once in a while. But for younger generation it is the food to enjoy.

Yes. Once in a while consuming junk food is wel come to enjoy the feeling of Euphoria. 

Yes, it is quite true.  Even today, Lays the potato chips product from Pepsi, sells like hot cakes in the metros and the big towns.  However, the detrimental effects are so strong, particularly on kids.  It is really a very big problem, as they soon get addicted to it, and refuse to come out of the habit, no matter whatever the parents try. 

Let us not spoil the youngsters.  Let us educate them that they will loose out physically, if they persist with junk food.

True. If the parents are aware of the bad effects of junk food, the children can be saved from this menace of junk food. Of course, it's heartening to see that change in the parents and the number of junk food addicts are coming down slowly.

Lays and Kurkure and very tasteful but not every parent can afford it in their day to life one's if child getting addicted to it. Junk foods are not a daily eatable item and it causes many side effects. Today most of the kidney problems are arising in young men and women due to not taking proper healthy diets in their food list.

The magic of junk food is it makes you an addict. A junk food addict becomes a slave and he cannot leave it, even if he wants to leave.

Yes, just like beverages have a effect on humans, which releases happy hormones, junk food does the same. No wonder we enjoy having loads of pani puri! It does make u happy. Same goes for other junk food.

We eat junk food occasionally, knowing fully well what we are eating and  it's bad effects, if continued. If some one knows what he or she's doing, they can never become addicts of junk food.

Can samosas, jalebi, tikkis,kebabs etc be classified as junk food. The attention seems to be always on burgers and hot dogs and pizzas.

The junk food consumers are more oriented towards burgers and pizzas than samosas etc. that's why, the attention is more towards burgers and pizzas.

By only highlighting pizzas and burgers as junk food we are protecting samosas and other Indian junk foods and this does not serve the purpose of moralists. Is it more of a cultural issue -- foreign junk is worse than desi junk food?

Yes I agree eating junk food once in a while really gives us pleasure and a positive feeling.

As long as eating junk food doesn't become an addiction, it can be taken occasionally. But, it's advisable to restrict the habit to the minimum possible extent.

Then what does one eat?

Anything one likes keeping a safe distance from the junk food.