British girls say that the worst morning-after nightmare is waking to their new lover's bad breath.
A poll of 1,045 adults by BioRepair toothpaste revealed that a stale mouth bothers nearly half of women-41 per cent-far higher than the one in four who fear getting naked in front of their man, reports the Daily Express.
And one in three men are bothered too by 'morning mouth', revealed the survey.
Other dating nightmares include suffering awkward silences, being stood up and your partner in need of a deodorant.
The poll has also revealed that most people fear having food stuck in their teeth, discovering they have no chemistry with their date, falling over and spilling a drink.
One in four men fear being stood up on a date compared with just six per cent of women.
Louise Fair, spokeswoman for BioRepair toothpaste, said: "It was surprising just how fearful Brits are of having morning breath in front of a new partner, especially as this came in as more embarrassing than being naked in front of a new partner."