I was dreaming about having sex on my side once....and woke up to find myself sliding my cock between my honey's butt-cheeks. The mix of nite sweat and pre-cum made it feel as wet and hot as any pussy...and she was out of it due to NyQuil, so she hadn't woken. I debated whether or not I should 'finish up', since it was feeling so damn good. In the end, I was a nice guy and stopped...but it was tempting!