Alright, this may sound really weird or messed up, but I think there might be something to it..
So lately I've been thinking.. Our sexual drive is our most primal and powerfull instinct/urge. Let's say you, in this exact moment said "I will NOT jack off or have sex. I will only release my urges in my lucid dreams!"
You would then on a subconcious level bind your sexual instincts to lucid dreaming, therefore, making your subconcious strive for lucidity.
I might be wrong, but it makes sense. What do you think, brovskies? I'm so trying this.