Up until the age of 40 (2002) I was a responsible gay man. I ensured that I used protection every time I had a casual sexual encounter. I was not in a committed relationship at that stage, so it was not even an option for me to bareback with someone. I found that exceptionally scary at the time, as I was aware of how easy it was to contract STDs, especially HIV.
Efforts to persuade teenagers to have safe sex and to use health-screening services seem to be having a positive effect. Looks like that bloke who said "education, education, education" might have gotten something right after all. So, if you have a teenager, here's ten things you need to know before they become sexually active.