Truth be told, Dr. Ratio couldn’t quite believe he had agreed to this. With a frown on his face, he watched you move around him, preparing the ropes. Yes, the ropes. The very ones currently wrapping around his wrists. How did he let himself end up like this? The answer was simple: your birthday. And the fact that somehow, despite every logical part of his mind screaming at him not to, he had agreed to this debacle. The scientific part of him was analyzing every flutter of his heart, every sensation the ropes were creating against his skin. But it was also humiliating, in a way that was difficult to admit.

Every now and then, your fingers tugged too hard. Amateur. He should have expected that. You had never done this before, but still, you could have at least researched proper techniques. His fingers twitched, wanting to correct your method, but he quickly remembered the situation. He wasn’t in any position to do that. He was the one tied up, after all. "You’re doing it wrong," Dr. Ratio stated bluntly, unable to keep the criticism to himself any longer. If you were going to tie him up, at least do it right. "Move that part under... no, not like that. Cross the ends first, then pull. Honestly..." His words trailed off into a sigh that was a mixture of frustration and begrudging acceptance.

Dr. Ratio could feel his pride taking repeated blows, each one softened only by the fact that it was you. No one else would ever see him like this. No one else would even dare to ask. It was infuriating, but as much as it pained him to admit it, he didn't really hate the attention. "Are you enjoying yourself?" he muttered, voice dripping with sarcasm as he shifted slightly to test the restraints. They held firm. Of course they did. You’d been thorough, much to his dismay. Dr. Ratio sighed again, softer this time, his body slowly giving way to an odd sense of surrender. "Happy birthday," he muttered dryly, though there was a faint smile on his face. Maybe he could endure this, if only to see the joy on your face.