Condoms can protect against both sexually transmitted diseases and pregnancy, and if used properly are 95-98% effective in preventing pregnancy.
When people start having sex they are often more concerned about pregnancy than sexually transmitted infections, but condoms can protect against pregnancy and STIs.
A woman who had caught Chlamydia and genital warts after unprotected sex with her boyfriend, said that she was now really careful to avoid any genital contact without a condom. Condoms are available from a number of outlets, but it's not always easy to get them.
So why don't people use condoms every time they have sex? Reasons include people thinking it's okay not to use them each time or because when they've been drinking the risk of disease or pregnancy seems less likely.
Not having adequate advertising about HIV, the media in general, and pressure from partners can lead to some women having sex without a condom.
Many people use condoms at the beginning of a relationship, but stop using them when they know each other better and have both had an STI check-up. People in their twenties were more confident about discussing sexual history and more aware of the need to discuss using condoms.
Some people remember being embarrassed to ask for condoms from their GPs, family planning or Brook clinics, when they were teenagers and others dislike free condoms which they think are 'too thick' or 'too boring'.
Many buy their own condoms, but find them expensive, and that's another reason why people may stop using them.
Many people have experienced a condom splitting or falling off, and in such cases usually get emergency contraception (see 'Emergency contraception').
A father of two said that he doesn't mind using condoms at all, although he knows that other men have very different attitudes. Some people do not like condoms, calling them a 'hassle' or 'a pain', or that they spoil the moment.
But there are many different types of condoms (different textures, colours, and flavours) available so there's usually one to suit. And after all, a baby or an STI is more of a hassle than a condom!
Last reviewed April 2010.
Last updated April 2010.