Clear, painless discharge from penis, often during sex play, but I have erectile disfunction and discharge is NOT ALWAYS during arousal, ehich I still experience despite ED. I am morbidly obese with Rheumetoid Arthritis and while sexually active have not completed actual intercourse in seven years or so, so STD is unlikely. First noticed as nocturnal emissions after wife died, presently occurs unnoticed or uninstigated. Thank you.