Sexually transmitted infections are really common in the general population, and judging by the number of patients I saw while practising near Stanstead a lot more common in airline staff. (Probably due to increase in general risky behaviour in airline staff - including flying) They are also making a
BIG comeback, where I am practising now the number of new diagnoses of Syphillis and HIV is sky rocketing (interestingly, a budget airline has recently started up at the local airport).
They don't just affect your genitals they also affect other systems; for example,
1, Syphillis - used to be the most common cause of insanity before the invention of Penicillin,
2, HIV - can present with practically any disease possible and probably some that you didn't know existed.
3, Gonnorrhoea - leads to infections at other places like lungs and joints etc
The list goes on.. and on..
My advice as always...
Don't be silly, protect your willy!!
See
www.gpnotebook.com if you want to know more, or use google images to see what the nasties look like