In 2014, nearly half a million sexually transmitted infections (STIs) were diagnosed in England alone, and this figure is by no means falling. So clearly there are some issues with our understanding of how they're passed on.
We asked the sexual health charity Family Planning Association's (FPA) Head of Programmes and Training, Paul Casey, to bust the most common misconceptions about STIs he hears:
Myth 1: HIV is something only gay men and drug users get
Some people still believe HIV is only a concern for men who have sex with men orpeople who inject drugs. This can mean other groups of people, including women and heterosexual men, are less aware of the risks and importance of regular testing.
In general, the risk of getting an STI through oral sex is lower than with vaginal or anal sex, but there IS still a risk. And some infections are actually spread more easily through oral sex, including herpes simplex (the virus which causes genital herpes),gonorrhoea and syphilis.
It's great to know that your partner has been cleared for STIs, but it's not enough to rely on their result to know whether you have an infection or not. It could be that you have an STI from a previous or different partner without knowing, and you might not have any obvious signs or symptoms. It's really important to get a check-up yourself.