I see Bowdon is doing his usual moral panic routine
Interestingly on a couple of studies/articles (based in the USA) I've just been reading, it seems sexual encounters in "the youth of today" are actually lower than that of previous generations - which seems to be loosely corroborated by the OP's post that the rise in STI's is driven by us older generations lol
Anyway, a good correlation as to why the younger generations are having less "casual" sex....because they drink less alcohol, and we all know there's a direct correlation between those two!
The largest study of young adult hookups shows that this 21st century spin on dating appeals most to affluent white students at top schools who plan to attend graduate school.
www.psychologytoday.com