Hairdoggie is right, that "gay" comment was only said to hurt you...and to justify to herself that there must be some other reason that you don't satisfy her....because we all know, she couldn't be a contributing factor now could she? LOL Nevermind the fact that you are on a drug that does affect ones SL. BTW....she she says you don't satisfy her...does she tell you what she needs in order to feel "satisfied"? Or are you floundering (cold fish reference here) around in the dark?
Here's a thought though....CSW (one of our other posters) found his diet was severly affecting his SD. He thought he was living the "healthy lifestyle" by eating tofu, soy beans....n'stuff like that. He came to find out later that much of his lack of SD came from the foods he was consuming.
So....what is your diet like. It's just a thought but it's possible your diet combined with the meds might be making things that much more difficult for you.