if the following is general knowledge , but would suggest that an outbreak of throat and larynx problems is on the cards.

Or a high consumption of antibiotics - BAD.

Slightly more than half of American teenagers ages 15 to 19 have engaged in oral sex, with females and males reporting similar levels of experience, according to the most comprehensive national survey of sexual behaviors ever released by the federal government.
The report released yesterday by the National Center for Health Statistics shows that the proportion increases with age to about 70 percent of all 18- and 19-year-olds. That figure is considerably higher for those who also have engaged in intercourse.

Several leaders of organizations that study or work with youth expressed surprise at the level of girls' participation. "You assume that females are more likely to give, males more likely to receive," said Jennifer Manlove, who directs fertility research for the organization Child Trends. "We were surprised that the percentages were similar."