They first travel to India, eating can be a major source of fear.
"Can I get Delhi's stomach?"
The answer is loud, "Probably!" but do not let him travel to the world's most magical magic country.
All right, back to banana. So eat a banana in India. Hold the stalk with one hand while cautiously cutting off the other … so far is like a home at home. But here's the important part – you have to make sure that if you touched the outside of the banana, do not touch the part you are going to eat.
Why? What may become ill may not be banana itself, but any tiny water drops of sprouts, etc. On the outside of the banana. So, with every detachable fruit, just make sure it never touches the look and then the inside – it's a bit tricky with oranges, but it's there.
For the same reason, you should not take salads in the restaurants or drink the water in your complimentary glass. The salad would be great, but the water you washed might want to have died. Some restaurants that cater for foreigners in particular can tell you they offer "filter waters" that is good for you, so this is not a rule, but the management of the environment – if it's a five-star hotel, you're right to do anything you eat because all this is for aliens to eat but if you're standing on a small road in the middle of nothing-ganj and every patron is local, then you're safe or you can ruin your freedom. Furthermore, you can never travel to India without comprehensive travel insurance, you do not want to be really sick and no one is calling.
As for Delhi's belly as the first trip to India, there is consensus. Most people are actually sick in the first week if they are eating homogeneous, well-liked local restaurants, it is safer to eat on the road stalls or eat anything with milk or yogurt where local power supply is unstable (everywhere, by the way). But with the dozens of repeating travelers I personally know, none of them were sick during the later visit, except maybe a cold here and there.
It's like your body needs Indian baptism, you're fine. You can also say that fire and water are baptism. But it's worth it, because as India gets into your skin, not to mention the digestive tract, you will never be the same.
And another thing about bananas – they can be deadly in many ways like one. Do not feel like hungry urban monkeys, or if you take some nasty fight from your hand, did I mention travel insurance?