Dental Hygiene - I've Never Had a Cavity

I have kind of like sensitive gums and I think the electric toothbrush kind of irritates it a little bit more. So I just use a regular toothbrush. An extra soft. Yeah, extra soft bristles. Why do they sell a hard toothbrush? Oh, I don't know who is using that. It's every dentist will say, do not buy that. Maybe they sell them so then you screw up your mouth and then that's how the dentists make money.