It is the art of minimising the number of sexual partners you have and using safe sexual practices which do not involve the exchange of body fluids such as semen, blood and vaginal fluids. It is the art of using condoms in conjunction with water-based lubricants. It is the art of choosing not to have sex if you don't want to. It is the art of the imagination.
Safe sex is just as satisfying and enjoyable as unsafe sex.
Basically you can save yourself a lot of grief by practising safe sex. Your chances of catching a disease is a whole lot less. One of the most important things is to talk to your partner about practising safe sex. Remember, it's not that hard a subject to raise. Lots of girls actually prefer this to intercourse becuase it involves direct stimulation of the clitoris which is a very sensitive part of a woman's sexual organs.