Spock was distracted. But if you were to call him on it he would declare to his dying day that Vulcan's don't get distracted. Then again he would also tell you that Vulcan's don't lie and he knows that's a load of crap. He could blame this distraction on Captain James T. Kirk and the bored habit that he had recently picked up.
Spock had known since day one that the captain bit his nails but he had never seen him do it on the bridge, until about a week ago. They had been having an uneventful shift when Spock first noticed it, Jim's long fingers sliding in and out of his mouth with a slight suck as he pulled one out to be replaced with another.
Day one of the habit Spock had been able to muster up enough control not to moan as he watched Jim practically give his finger a blow job[although Spock knew that that analogy was illogical and impossible it still turned him on].
Day two of the habit Spock had to excuse himself from the room to relive some of the built up tension.
Day three of the habit Spock lost it. When Jim went down to lunch Spock practically jumped him in the turbo lift, and as Spock kissed every available place he could get to he was thankful that Jim didn't have any nails otherwise he would have had to explain the scrapes he was sure to have gotten.
A/N- I know its crap but I couldn't get the thought out of my head. Review Please!