as i understand it, the prostate contributes about
30% of the liquid in the semen. the biggest portion is contributed by the seminal vesicles (sp?). but since the vesicles are so intimately connected to the prostate, when the urologist takes the prostate, he takes these out also, for pathology to check for invasion of any cancer. so you've lost all the liquid generators except the pre-ejaculate, which in most cases is also nothing. there are several guys who lose the ability to hold back urine during the orgasm experience, but i'll let somebody else expound on that one...
anyway, sounds like you're in pretty good shape, and i would guess with a little time should be back in business...[speaking with all my authority as an electrical engineer!]
keep us posted!
bob