Before Shane could approach the table, Anthony came over and performed a few cursory functions, recording Chris' pulse, his blood pressure, and his temperature. The last thing he did was grasp Chris' cock firmly, admonishing Chris to lie still when the younger man sat bolt upright and protested the contact. He gauged the length and thickness, remarking to his assistants that it was a most peculiar specimen indeed. "External genitalia," he marveled. "How primitive." He finished his examination and moved on to Shane, performing the same impersonal inspection. He expressed surprise over the physical similarities between the two. "They would appear to have the same reproductive organs. I wonder if this is typical among the species."

Breathing a sigh of relief when the doctor walked away, Shane moved to stand at the foot of the table, looking shyly down at Chris. He noted with slight satisfaction how the other man's cock, which had softened slightly during the examination, was becoming firm once more now that Shane was near. Perhaps this wouldn't be quite so terrible after all, he pondered.

Shane was no stranger to anal sex and he knew a fair amount of preparation was needed first. A thought suddenly occurred to him and he cleared his throat nervously. "Um, Anthony? I'm going to need some kind of... lubrication... for this to work."

Anthony arched a brow in curiosity. "Ah, then our research is correct. Penetration IS a part of the process." Shane colored slightly before nodding. "Very well. I believe I have something here that will work." He opened a drawer under one of the cabinets, withdrew a small bottle, and brought it back to Shane. "This should suffice."

Shane examined the contents and nodded his agreement before walking back over to Chris. He looked down at his terrified friend and smiled gently, trying to reassure him as best as he could. "I'm not going to hurt you, Chris. Do you believe me?"

Chris closed his eyes briefly before speaking. "I believe you, Shane. I'm sorry we have to do this." Shane opened his mouth to speak but Chris silenced him. "I'm sorry we have to do this," he repeated. "But I'm not sorry that it's you."

The look of shock on Shane's face was genuine. "I... I think that's flattering. I guess I should tell you the reverse is true, too." Chris smiled in response, lay back down, and bent his knees, signaling his readiness to begin. Shane opened the bottle the doctor had given him and poured a small amount of lubrication into the palm of his hand. He then wrapped his hand around his cock, giving it several long strokes. He noted with surprise that merely thinking about what he was about to do was enough to make him rock hard.

After Shane was satisfied that he was ready, he set about preparing Chris for the inevitable. Making sure his fingers were well lubricated, he pressed his index finger against Chris' entrance and felt the other man stiffen slightly at the touch. After a few moments, he applied a little more pressure and waited for the ring of muscles to loosen up, which they eventually did as Chris forced himself to relax. Chris spread his thighs a little more, silently urging Shane to continue.

Shane penetrated Chris with deliberate slowness, determined not to hurt the other man. When he was satisfied that Chris' body had adjusted to the invasion, Shane added another finger and began to scissor them back and forth, stretching Chris as carefully and gently as he could. He was just beginning to wonder if Chris was deriving any satisfaction from his preparations when he heard a soft moan. Chris moved ever so slightly against his hand and Shane smiled, thankful that it appeared this wasn't going to be a one-sided experience after all.

Chris gripped the edges of the table when he felt Shane remove his hand. "Go ahead," he whispered softly and closed his eyes in anticipation.

Shane moved closer to the table and lifted Chris' legs, hooking them over his shoulders. Chris scooted himself closer to the edge to grant Shane easier access and let out a gasp as he felt Shane's cock press up against his entrance. Shane slowly eased the head of his cock inside, giving Chris as much time as he needed to adjust to the size difference. When he felt Chris' muscles relax around him, he placed his hands flat on the table on either side of Chris' hips.

Shane exerted little more pressure, groaning with pleasure as he felt his shaft gradually become enveloped in Chris' snug heat. He continued to press forward, his eyes firmly fixed on the man in front of him as he whispered so that only Chris could hear him. "So tight! So fucking tight..."

Chris tried his best to stay still as the initial discomfort was a fair amount more than he'd expected. He opened his eyes and saw an expression of pure pleasure on Shane's face. He concentrated harder on relaxing and gradually felt the pain fade away, leaving behind an indescribable feeling of fullness.

The moment Shane felt Chris fully relax around him, he gave a strangled groan and rolled his hips forward, burying himself as far as he could. He stilled his movements again and waited for Chris to adjust to his size. Eventually, Chris began to squirm beneath him, encouraging him to withdraw almost completely before smoothly gliding back in.

Chris moaned Shane's name, prompting the other man to begin to piston his hips rapidly. The sound of skin against skin seemed almost deafening in the room. The presence of the others completely forgotten at this point, Shane abandoned himself to the task at hand, letting out intermittent grunts of exertion

Almost instinctively, Chris lifted his hips, changing the angle of penetration. On the next stroke, Shane grazed Chris' prostate and the prone man let out a shocked cry. The sensation took him completely by surprise and he began to rock his hips upward, trying to increase the contact, all the while urging Shane on with nearly incoherent words of encouragement.

Feeling Chris come apart beneath him, it was all Shane could do not to climax right then and there. He forced himself to maintain a steady pace as he reached between Chris' thighs to grasp his rigid shaft. He began to pump Chris' cock in time with his own thrusts, determined to drive them both over the edge together.

A plaintive whimper from beneath him confirmed that Chris was nearly delirious with need, and Shane decided to bring things to an end. Withdrawing nearly all the way, he drove forward one last time, burying himself to the hilt as he gave Chris' cock one final stroke. He felt Chris' muscles tighten around his shaft and let out a loud cry, emptying himself inside the other man. Upon hearing an echoing shout from Chris and feeling warm moisture on his hand, Shane glanced down, seeing that Chris had found his own release as well.

He remained where he was for a few moments more, giving his rapid-fire pulse time to return to normal. He felt Chris' weight shift beneath him slightly and slowly withdrew from his body, concern etched on his face now that the 'experiment' was over. Would Chris be pissed at him now that they were done? He hazarded a look at the other man and relief washed over him at the radiant smile that he saw. He extended a hand to help Chris off the table and smiled inwardly as Chris stumbled slightly, still a little weak in the knees.

When the doctor cleared his throat, both men startled, having almost completely forgotten their audience. "Your intimate habits are intriguing, to say the least," Anthony remarked, wonder and curiosity evident in his expression. He handed the two men their discarded clothing and watched them dress. "I would be interested in further demonstrations at a later date."

"So would I," Chris whispered so that only Shane could hear, and smirked at the shocked stare he received by way of a response. As the two men were escorted back to the shuttlecraft for their return to the arena parking lot, Chris found himself replaying the events of the past hour. The last thing that went through his mind was how thankful he was that it had been Shane he'd chosen to leave the arena with tonight.