Nothing can make a romantic date fizzle faster than a dirty mouth. And we aren't talking about what comes out of it.

In fact, a survey of both men and women showed that the biggest deal-breaker in a relationship is bad breath. That's because sense of smell is key to finding a suitable mate. Nobody wants to kiss a stinky mouth, so here are eight ways to make sure your mouth is always kissable, guaranteeing you'll always get that second date.

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Brush Your Teeth

This should go without saying, but the best way to avoid bad breath is to practice good oral hygiene. Brushing your teeth twice a day is the best way to keep your mouth clean and healthy. But don't just focus on your teeth.

The tongue and palate need cleansing, too. Your mouth is full of plaque that can damage tooth enamel and cause cavities and other dental ailments. For best results, replace your toothbrush every 3-4 months.