And NOT taking prophylactic antibiotics (and being exposed to STIs) means that until the incubation period has passed (which can be 2 - 3 weeks for common STIs) you are completely unaware that you are infected, and are unwittingly infecting others.

Them, WHEN YOU COME home you may STILL be unaware that you are infected and you will then be passing it around all and sundry until (if you're lucky)you notice custard coming out your dick or (in the case of Chlymidia) you notice absolutely NOTHING and continue to pass it round every partner you have until some unknown date in the future.

Why don't you tell us all your medical qualifications Tobi.

Bye.