The following comes from England. Can't imagine it is any better in North America just better hidden and under reported.

Nearly half of all new sexually transmitted infections are in people under 25.

... new STI diagnosis in England every 70 seconds.

...nearly half a million STI diagnoses in 2018 and found cases of gonorrhoea were up by 249% and syphilis up by 165% in the last ten years.

link