An urulogist pointed me in the right direction.
It's stool pressing on the prostate. After ejaculation, the prostate is very sensitive, and stool pressing on it creates pain.
Either empty bowels beforehand or after symptoms arrive. The latter will releave my symptoms within minutes.
Hope this helps anyone :)
i have had the same problem from the age of 17.
im now 47and untill RECENTLY suffered with this problem,
this year has been TROUBLE FREE,
ive performed penis exersises as part of my after shower routine,
and ive had trouble free sex and masturbation since,
When you go to the doctor, ask for a prostate exam, and urine or swab testing for stds.
AJ