"I call bluff, but… okay." Slowly taking out his phone, he began typing in various passwords and identity checks. "I uh. I planned for you to see this in person soon, if not today, but it's probably better to show you what you're getting yourself into first." Once he finally accessed the photo album he scrolled as far back as he could, finding pictures from when he was young. He'd asked for them a few years ago, and his parents had happily sent them to him. Stopping at one particularly cute photo of him and 131-A (given the name Allen), he smiled to himself. He had to be at most five in the picture, and he was holding a messy drawing of Allen proudly to the camera, while said creature sat next to him, somehow looking just as proud.
"Okay. Okay. Okay…" He muttered quietly, hyping himself up for this. With a sharp intake of breath, he turned to show the photo to Carson. "That's Allen, officially known as SCP-131-A. And that's me when I was, like, five. My family houses them. The-the harmless ones, I mean." He looked up at Carson, expecting him to burst into laughter any moment now. He didn't expect his boyfriend to believe him immediately.