The guys find out about Amy and Sheldon's first time.
Sheldon carefully sneaks into the apartment. He doesn't want Leonard to hear him and wake up, and he definitely doesn't want his roommate to realize he's returning home at seven in the morning.
Except that Leonard, Wolowitz and Koothrappali are all uncomfortably sleeping in the living room. Sheldon distinguishes the case of The Empire Strikes Back and remembers they had agreed to gather there after the new movie to discuss it and eventually watch again some chunk of the old ones. Oh well… he sighs, and hopes they won't notice him as he hurries to his room.
"Sheldon?"
Leonard has woken up, and he is sleepily staring at him from the armchair, "I- I thought you were in your bedroom."
Howard yawns from his sleeping bag, and briefly studies Sheldon's figure. He doesn't miss to notice the elegant attire, "Looks like Amy's birthday party lasted a while."
"I slept over at her place, if that's what you mean," Sheldon admits, "It got late last night."
"Hmm… what's happening?" Raj asks.
"Good morning, Raj. Well, Howard and Leonard have noticed how I am wearing the clothes I presumably wore last night and that I was trying to reach my bedroom hoping no one would have understood I didn't sleep here," Sheldon explains, "I think I got into the kind of situation that you guys call 'walk of shame'. I am not sure where the shameis in this, though."
Howard nods, "I think we can call it so. Minus the sex, of course."
Sheldon gulps. They don't know? He was sure Penny and Bernadette had spilled the bean the second after he told them. He sighs, and moves toward the kitchen. Since everyone is awake now, he might as well prepare some tea for everyone.
"Actually, the definition perfectly holds. Amy and I had coitus last night. Would you like some tea?"
He turns to put the kettle on, but he can clearly hear Howard spits and almost chokes with the sip of water he has foolishly decided to take a few moments earlier. When he turns back, Wolowitz is still trying to catch his breath, Raj has left slack-jawed, and Leonard is smiling like an idiot.
Waiting for the water to boil, Sheldon sits on the couch where Raj promptly has made room for him. He faces him, "It's not another experiment like five years ago, is it? You two really had sex?" He questions Sheldon.
"Yes, we have," Sheldon calmly confirms, "And by the way that experiment clearly proved us what kind of blabbermouths you all are, so there's absolutely no need to repeat it." He stops for a moment, "Although I may want to reconsider Penny and Bernadette. They had kept the secret surprisingly well," he comments.
"Wait a second, you told them and not us?" Howard exclaims, "How? When? Why?" He complains.
Leonard looks like he's still elaborating the news. He stares at Sheldon, then finally speaks, "How… how comes you guys finally went for it?"
"I wanted Amy to have a very special birthday present. I asked Penny and Bernadette for advice," Sheldon explains, moving his eyes from Leonard to Howard and back, "But honestly, I had already decided for coitus. The wool festival seemed a bit of touristy."
His friends all briefly study him to see if they could get any explanation of this last part, but Sheldon doesn't seem up to it. "We just got back together and… I felt ready for it, that's all," he concludes with a shrug.
Howard stands from the floor and sits on the couch arm, "Okay, but how it was?" He inquires.
"Is this becoming some sort of guy talk where I am expected to share details about my sexual encounter and brag about it?" Sheldon checks, "Because in this case, I don't want to."
"Yes!"
"No!"
He looks confused to the sources of the opposite answers, Howard and Leonard respectively. The latter throws a reproaching gaze at Wolowitz, and reassures Sheldon, "You do share only what you feel comfortable to tell us."
Sheldon stares back suspiciously, but soon his face softens because of the good memories quickly resurfacing. "I- I think she enjoyed it," he begins, "and so I did. It was gentle, and… and fun. I was kind of afraid I could have… you know, ruined everything. It went well, though. Very well," he recalls, a cheerful grin stuck on his face.
"Sheldon, that's great," Leonard says, "I am so happy for you guys. I mean, you really love her, do you?"
Sheldon nods, "I do," he confirms, and Leonard is even happier when he sees how his best friend's eyes sparkle saying that.
The kettle goes off. Sheldon excuses himself, and stands to turn it off and serve everyone tea.
Howard, Leonard and Raj keep observing him with various degrees of silly smiles on their faces.
"And I thought the new Star Wars was the best thing that could happen," Raj observes, "But this… not even close!"
Sheldon is looking back at them, glowing.
"You can tell it," Leonard agrees.