Something to smile about or not? Bad oral health ....................... The biggest turn-off on a first date. According to a survey, bad teeth are a bigger turn-off on a first date than spotty skin or bad table manners. Almost half of men surveyed spend less than 5 minutes each day brushing their teeth. Women spend more time applying make-up then they do brushing their teeth. And 85% of people would turn down a kiss because of bad breath.