Casual sexual contacts tend to be higher while on holiday abroad. Sexually transmitted diseases, particularly AIDS, form therefore an important risk for travellers. Quite often unintentional and unsafe sexual contact takes place under alcohol influence. Studies show that mainly people travelling without partner are at risk; many of the unsafe sexual contacts were unscheduled beforehand. Prevention while on holiday abroad is no different from the precautions you take at home. Adequate use of a condom, preferably bought at home, is absolutely essential. Only a water-soluble lubricant should be used, but it only offers a partial guarantee (e.g. KY gel). Vaccination against hepatitis B is advised.
Always consult your doctor if you think you are at risk, even when there are no symptoms.