Not only that, but it also encourages more frequent sex relations for parents.

WA Today
27 December 2008

No breakfast, earlier sex: Japan study

There are many theories on the links between food and sex, but
Japanese researchers have came up with a new finding - young people
who skip breakfast tend to lose their virginity earlier.

In a study of 3,000 people, those who did not regularly eat breakfast
when in their early teens said they lost their virginity at an average
age of 17.5, versus an overall average age of 19 for all Japanese….([1] Full Story)