First of all, congrats on your first double.
Sorry to hear that it didn't go as well as you had hoped, but trust me, the more of them you do, the better it gets.
I'd probably put your 'performance' (or lack thereof) down to performance anxiety and thinking too much - just relax and let yourself go buck wild.
I remember the first time I did a double, I had issues maintaining firmness as well, but then I thought to myself, who gives a sh!t about trying to satisfy both of these girls, this is about me - and low and behold, being the freak that I am, I went wild.
Haven't looked back since.![]()