First let me say that the most reliable testing for an STD is via urethra swab. So I wouldn't rule that avenue out as of yet.
As far as the other (which is possible) Muscles in the testicles and the vas deferens contract, ready for the semen to go down the urethra. The passage of urine into the urethra is blocked off. Fluid from the prostate gland and the seminal vesicles mixes with the sperm to form semen, which collects at the top of the urethra.
So at this point, I would verify the possible STD and I would also ask about a semen culture as well.
If all that comes back clean. Then you may need to have a scope done. Which if you are only seeing a family doctor, I would suggest seeing a urologist.
Hope this helps Hun
After thinking about this a bit, one thing you may want to just try (not sure if it will help) but try taking about 600mg of ibuprofen about 45 min prior to having sex and see if this helps, as ibuprofen is good for inflammation.
Other wise, a magnifying scope to view the urinary tract may be needed.
Edited by eidnil on September 15 2006 at 8:36 PM