YES! DO NOT RIDE WITH THAT SADDLE AGAIN UNTIL YOU VISIT A GOOD LBS AND HAVE YOUR SEAT POSITION EVALUATED!!!!!!!!!! Sorry to yell but it is extremely serious if you have numbness and you should not ride on that saddle if you are experiencing it, temporary or otherwise. You can ask yourself, "Do I really like riding on a saddle that does a number on a guy after 8 miles so much that I am willing to sacrifice my sex life for it?" If your answer is No!, then see your LBS. They will help you find the best position for your saddle, or suggest a different saddle if this one does not work for you.