So much misinformation so little time. First 30 miles isn't a long enough ride that you should have any issues. Numbness, ED and lowered libido are three separate but inter-related things. Numbness is a nerve issue, ED a blood vessel issue. The average sports medicine doc is either orthopedically or family medicine trained and doesn't know much about any of these, a urologist(like me) is who you should be seeing. Unlikeliy its a Testosterone issue given your age but easy to check. A one time problem can occur with anyone, you don't say whether its ongoing on not. See a urologist.