Got another P.S. to add to this. Just as my little problem was clearing up, I woke up one day nearly three weeks ago now, to find one suddenly enlarged left gonad. Of course, I did what any normal person would do and looked it up online. One swollen gonad, or two for that matter, can mean a number of things, but a response to a gonorrhea infection, or something that gonorrhea can set off, is one of them.
So back to the GU clinic, who confirmed it was the likely reason. Took two weeks of antibiotics and said gonad is now close to normal again.
One month after the 'event', I'm pretty sure I'm OK. Have to go back yet another time, hopefully for the last time, for a check up in the week. As the clinic doctor says, gonorrhea's getting tougher by the day and may well be incurable in a few years. I would NOT want to learn to live with it.
End of the day, I like OWO same as the next man, but after this little saga, I'll not be rushing back to do it.