Here's some TMI for you...
I was getting chafing from the hair around my anus when I run. It doesn't bother me on the bike, but maybe that's a possibility? I'd never trimmed that hair before, but once I started running longer distances, I had to start keeping it short. 
+1 on taking a look at the area to see what you can see. Not too hard with a hand mirror and a good light. (Mine looked like a baboon's @ss, it was that red.
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Last edited by OakLeaf; 06-23-2010 at 03:48 PM.
Speed comes from what you put behind you. - Judi Ketteler