there are lots of things to try, herbal supplements, numerous in-home remedies.. not to mention just getting plain out freaky... have your chick suck your dick, and stick a finger up your ass, at the same time, after awhile of this, let her just gently touch your dick, tease the loving fuck out of you.... then go to sex, if this doesn't work... maybe you should consider frequenting some gay bars, and see if you get a better response. alot of times, people are gay, and they don't even know it... they may never have found a guy attractive, and may of even been strongly opposed to homo-sexuals, then they have one experience, even something as simple as hugging, and it instantly clears things up for them... of course, if you could clear your mind of "homosexuality is bad" then tried masturbating to gay porn (technically, you'll be the only one to know, so it couldn't hurt) and see if that helps... there are multiple reasons for these types of problems, some of the main being; sexual frustration/tension, going after the wrong sex (instead of going after females they need to be going afte rmen) medication/food interactions, and so on... it's kind of hard to give you any clear answer unless i had alot of details, including but not limited to, experiences with same sex and opposite sex (numbers of times sexual relations happened with either) estimated stress level, any 'impurities in your body' (basicly, pharm's, otc's, illicit drugs, so on..) that's not all, that just scrapes the surface.