Fenugreek
Fenugreek earned its magickal reputation as the herb of increase. This potion increases male sexual ability and vigor and may magickally remedy impotence as well.
Place two teaspoons of dried fenugreek in a cup and cover with boiling spring water. Steep for five minutes, then strain. Add lemon and honey to taste.
If the flavor remains too medicinal, try combining with peppermint, also a strong aphrodisiac.
From: The Element Encyclopedia of 5000 Spells