I Love You For Your Big Cock

I know how to give a blow job, but I’ve never bottomed and have no idea on what else I can do to make you feel good. 
Part 1: I’ll Show You Mine If You Show Me Yours (Gay Awakening)
*****
“Uh, I guess I better get out, so you can go,” Jamie said, nervous now that their laughter from his explanation of the bruise had subsided. Jamie shifted to climb off Sam’s lap, but stopped when Sam’s hand tightened on his thigh. Jamie’s spine stiffened and he stilled, but he couldn’t meet those piercing blue eyes. The intensity of their encounter was fading fast, and he honestly couldn’t believe that this – whatever this was – would go any further. Surely the man was about to give him the brush off. Sam was by all accounts straight.
Right?
Sam slipped a knuckle under Jamie’s jaw and tilted his face back. Jamie’s teeth worried at his lip as Sam opened his mouth to speak, but his gaze zeroed in on Jamie’s mouth like a heat-seeking missile. The big guy lost his train of thought as his system went on red alert. He used his thumb to pull Jamie’s abused lip free and with his hunger’s need locked on the plump flesh of its beguiling target he swooped in for a kiss, lips firm and demanding. Destroyed all over again, Jamie’s body melted against Sam.
Sam groaned at the feel of the boy’s slight weight settling, once again, into his lap. He let his hand drift down from that small, pointed chin to squeeze briefly on his baby’s throat where his pulse beat wildly. Jamie whimpered, and his hips thrust involuntarily at the pressure on his neck; Sam made a mental note of the hot spot. Damn, the little guy’s response to his every touch made him...