I used to suffer lots of problems with numbness and "strange feelings" in the groin area dispite trying several different saddles nothing seemed to work.
Infact I packed in for a while as it was simply not worth it.
I also felt that the pain was caused by the basic design of a traditional saddle being wrong because it put so much weight in the wrong area.
Anyway after a while I really missed my cycling and started again I also did some research about impotence and other cycling related problems.
Anyway this lead me to try the hobson saddle which has a totally different design to a traditional saddle anyway I gave it a go.
http://clients.corifeus.com/hobson/web/medical.htm
I was not sure to start with but after a while I realised that my pain was getting better.
I now cycle whenever I want and can do a century with almost no pain.
Alot of the problems I had before were noticable later in the day like numbness ect and I hardly get any of that now.
Both my bikes now have this saddle and I probably would not cycle nearly as much without them.
Clearly not eveyone gets pain but I have a feeling a hell of a lot do and while the above saddle may not work for eveyone I think the basic design of a traditional saddle is wrong as it puts pressure in the wrong places.
By the way I have no connection with Hobson and being in the UK had to get mine imported.