How people choose their toothpaste?

Interviewer: What toothpaste do you use?
Interviewee: Colgate Miswak.
Interviewer: For how long have you been using it?
Interviewee: For over 2 years.
Interviewer: Any specific reason of choosing it?
Interviewee: Recommended by my brother's dentist.
Interviewer: Oh, Why is that so?
Interviewee: My brother had a problem with his stomach and any toothpaste's taste made him sick.
Interviewer: Would you have chosen the same toothpaste or brand?
Interviewee: Same toothpaste? I don't know. Same brand? Yes.
Interviewer: Why would you choose the same brand over others?
Interviewee: It tastes good.
Interviewer: What would you do if Colgate never existed or they stopped making more toothpaste?
Interviewee: I would choose another one that tastes nearly as good as it does.
Interviewer: Do you brush your teeth before eating or after eating?
Interviewee: In the morning, before breakfast. Sometimes in the night after dinner.
Interviewer: Is it because you want to feel fresh as soon as You wake up?
Interviewee: Yes it is.
Interviewer: If you were to make a brand for toothpaste and could only make one type of it, what would you do?
Interviewee: Make that toothpaste that has crystals in it and make it taste like Colgate without my brother getting sick.