[ Spock actually encourages Jim's playing with this pajama bottoms, the ultimate goal is for them to be naked together. He leaves the answer for Jim to decide, but Spock's plan is still forefront in his mind.
Once his bottoms are off, Jim will see that Spock is already on his way to hardness, his cock standing at half attention. But he seems to ignore himself for the moment, turning his concentration back on Jim. He slides back down the bed when Jim's self-consciousness ebbs away, directing his mouth to leave a cool trail down the side of his hip, dragging his teeth along the way. It's like he's trying to memorize every inch of Jim's body again, a hand running down the inside of his thigh and calf before he switches sides to cover the same areas. ]
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Once his bottoms are off, Jim will see that Spock is already on his way to hardness, his cock standing at half attention. But he seems to ignore himself for the moment, turning his concentration back on Jim. He slides back down the bed when Jim's self-consciousness ebbs away, directing his mouth to leave a cool trail down the side of his hip, dragging his teeth along the way. It's like he's trying to memorize every inch of Jim's body again, a hand running down the inside of his thigh and calf before he switches sides to cover the same areas. ]