I have no clue about the answer to your first question. Are you
talking about a burning sensation?
>would ejaculating a few
>minutes later and urinating have any effect on std's as in lowering the
>probability?
Depends on which std you're referring to. Might make a difference in
certain cases, maybe (like Chlamidia, etc).
As for Herpes, I doubt it'd make any difference in transmission risk.
Herpes is more likely transferred to the outer skin of a male rather
than the urethra. Skin rubbing against skin is its prefered method of
transfer.
M2