that's funny i'm trying to increase my libido and testosterone. This isn't really a good option, but i've heard weed can decrease testosterone levels..............
well , i liked ur question of decreasing libido. first of all anyone should try the nonmedical method, like for example :-
1. according to basics of psychology the more you think abt a disease , more u r going to stay wid dat. ofcourse increased libido is not disease bt its a condition which is causing problems for you, so here r the suggestions like , do not over indulge in these activity llike viewing blue films or having more of sex , if u r married try to decrease ur freq. of doin it.
if u r not married so decrease down ur freq of masterbation , or do not think of such things . some people of this variety think about havin incest relationship because it gives them more pleasure. so keep these things away.
medically you can try