When I'm on old if you see a girl who looks hb8 but only has 2 pics and not smiling I quickly move on. Means likely bad teeth.Dental health has been an obsession of mine since I was 12 and had a dream that my teeth were rotten and falling out. Let me back up your tongue comment. In addition to brushing, use your brush and scrape your tongue; go back as far as possible. Floss every night before bed. Buy mouthwash. Get your teeth cleaned once or twice a year. I carry a small container of sugar-free mints with me wherever I go too. When I worked in an office, I kept a toothbrush and toothpaste at my desk and brushed after lunch and certainly before a date.
For whiter teeth, don't waste your money on whitestrips. I rinse with one part hydrogen peroxide (3%) and one part water each night. HP is what they put in Crest whitestrips and it costs about $1 for a bottle at the pharmacy. And this way you get all the teeth, not just the front. It also promotes good dental health. Just be sure to buy the 3% version and dilute with at least one part water. The taste is a little weird, so if you don't like it just mix with mouthwash.