While a diet that incorporates plenty of fruits, vegtables, and lean meats is good for warding off erectile dysfunction (trouble having or sustaining an erection), there's no proven dietary intervention for premature ejaculation, or to use the more colloquial term, 'coming too soon.' The average time for ejaculation from the start of intercourse is around 3-6 minutes - so if you're within that range, there's no need for treatment. If not, you can try home remedies such as distracting yourself with different thoughts prior to orgasm, or gently squeezing the head of your penis just before ejaculation. If the problem is severe (lasting less than a minute), you can consider medication.