Yep it's all nerves mate, same thing happened to my boyfriend, first night I met him and a couple of times after, he made up for it by blaming the alcohol and licking my clit till I came. I noticed later it wasn't the alcohol tho when we had a three some, nerves came back. You just gotta relax and stop thinking about everything, just get lost as all your senses egnite. Too much thinking makes you soft. And as for the horny goat weed, I have no idea, sorry, I'm trying to look for an oppisite drug to turn mine off.