Does anyone know of a natural herbal remedy that increases male libido?

Awhile back I heard of a natural supplement that can increase the male libido (sex drive) and would like to find it again. PLEASE don’t send me advertisements for expensive pills designed for this (gimmicks, usually!!). I just would like to know which natural herbal supplements are able to increase sex drive in men.
Also, have you used it and did it work for you or your partner??? Thanks!