After exchanging messages on MedHelp.org with someone who has low libido, he mentioned a doctor who has apparently dedicated his practice to those with sexual dysfunction and low libido. The doctor is Dr. Charles Runels and he is in alabama. I believe this is his website:
He has also written a book called "Anytime…For as Long as You Want: Strength, Genius, Libido, & Erection by Integrative Sex Transmutation "