I'm married, not had sex with my wife for 18m but have been punting regularly. In-between AW bookings, I noticed a red rash on my bell end, so cancelled my next booking and went off to the clinic.
Saw a lovely female doctor who went through an extensive questionnaire - which included 'how many sexual partners, oral w/o, anal, and on'. She had a look and said that it was probably a bit of thrush and gave me cream, tested my blood and suggested a course of Hepatitis B jabs as I had 'a risky pastime'. Follow up appointments were made and initial & subsequent tests were negative, but I now will go every 3 months for a regular check up.