You can do any of the following two, all the items to be listed will be in yoruba, but all you need do is just to write them out and visit any roots&herbs and other traditional items seller's shop and show it to them, you can even ask them to help you prepare it for a token.
(A) Buy 1. Ewe Koropo 2. Eja Ojiji tutu kan(one fresh and live electric fish) 3. Ose Dudu (local Black Soap) like #150 one is okay 4. One big Bowl. How to prepare it: open the leaves one after the other, fill the bowl with clean water and put the leaves inside it, put the fish inside it also and leave it like somewhere till the following day. On the second day, remove all the leaves and the fish from the bowl, then pound the leaves and fish with the black soap very well inside a small mortal till it completely turns to only soap, put it inside a small white plastic and use it to bath everyday.

(B) Tell the Elewe Omo (herbs&roots sellers) to help you do this one if you are afraid to do it. Look for 1. Ako Alangba (a live Agama Lizard ) 2. Ose Dudu (local black soap). Preparation: put everything inside a mortal and pound it very till it completely turns to only the soap, use it rub-wash your dick everyday.
You shall soon have a cause to smile and also give thanks to almighty God. Goodluck