
Originally Posted by
Irulan
-Try a lower gear and staying in the saddle, but moving way forward so that the nose of the saddle is actually poking you in the butt.
-a variation of this is "put the nose of the saddle where the sun don't shine". 
I also put a longer stem on a bike once because I didn't have enough space to eat that cookie. But try radically changing your position as suggested before going this route. When learning, most of us don't move around on the bike enough, especially if we come from a roadie background where we strive for calm and still bodies.
Frends know gud humors when dey is hear it. ~ Da Crockydiles of ZZE.