never heard anyone complain that herb LOWERS sexual libido.Most say it makes 'em horny.Perhaps you should try smoking some and see for yourself.Cuase the only negative effect I ever saw come from weed is you might forget where you laid your car keys more frequnetly.It has a tendency to cause short term memory loss to some degree.Short term as in info you only need for a few moments,NOT long term memories like your BF's name or your favorite color.So If you dont mind hunting for your keys,or phone or whatever,once in awhile, I don't think that is much of a BAD effect to worry about.,