Groin pain

Can anyone explain why I have this very irritating pain in my groin?  I have developed a soreness, I don't really want to call it pain, it is more of a soreness or a discomfort between my scrotum and rear-end?  Makes me wonder if my prostate is taking a beating on the bike, is it not fitted properly or should I simply begin looking for another saddle.  I am a Clyde so (the added weight in the saddle) I am sure has something to do with it.

I know it's probably a silly question but I am a newbie and dont want to do any damage if it can be avoided.