BTW, except from Wiki. "The prostate, an organ whose main purpose is to store and secrete male semen, takes part of the
sexual response cycle in males, and is essential for
ejaculation.Normally, in mammals found to be most active during the time ofejaculation, this organ also faces many threats from disease. Due toits close proximity to the anterior rectal wall, it can be stimulatedmanually via the anus. Manual massage may lead to an urge to urinate,excretion of prostatic fluids without orgasm, and pain."
If you want to know more about the whole bit, pls follow this link:
http://en.wikipedia.org/wiki/Pro ... ote-pmid18597833-11
Cheers!