Originally Posted by
hockeyteeth
..I've always had trouble going numb on any rides longer than 20 miles. I shrugged off the problem and continued to ride until I developed a partial loss of sensitivity in the top-side of the shaft of my penis.
I'm rather blown away by this revelation. Who on earth, apart from you, would simply
ignore tackle numbness?
+1 to the suggestions about locating and addressing the source of the problem, be it a medical one or a problem of the way the bike fits your sit.