Jeff raised a hand to his newly-lengthened member, caressing it's full length. It didn't really feel any different from before, but it was almost twice as big as he used to be! He wrapped his right hand around the top and started to jack off, but soon realized that half of his dick wasn't even being touched. He then reached his left hand around the base and started rubbing again, this time feeling much better.
Now it did feel very different, with twice the nerves he had before. Jeff couldn't suppress a groan as he continued to rub his now-huge member. He was nearing climax very quickly, pangs of electricity shooting up and down his 12 inch monster. All too soon, Jeff could feel his balls tightening up and his cock hardening even more as he was about to cum. With a cry Jeff came, maybe harder than he ever had in his entire life. Spurt after spurt of cum shot out of his cock, emptying out his seed till his balls ached from use.
As his orgasm ended, Jeff was breathing heavily and lightly stroking his now softening, 1 foot cock.