I want a scenario where Cal has to wear this
Bruce tugged on the ring of the stainless steel collar, pulling upwards on it, making Calvin tip his head back. A lazy smile graced the escape artist’s lips, his amber eyes heavy-lidded and full of eager anticipation, waiting on the older man’s next move. Bruce didn’t rise to the challenge there, simply keeping his finger looped through the metal ring, mentally pondering over whether, perhaps, he could get it in a soft, rose gold; such a color would look fantastic against the former Talon’s skin.
"You’re staring." Calvin’s voice was amused but not mocking, his entire form relaxed.
"Contemplating." Bruce answered, his eyes locking with the other man’s, one of his dark brows arching. "I’m astonished you haven’t slipped out of it yet."
"Haven’t wanted to yet." Calvin’s lips quirked a little as he spoke, his tongue darting out to wet his lips.
Bruce tugged sharply on the collar, causing Calvin to suck in a quick breath as he was pulled closer. It was all quiet, subtle, but he was watching all of it, especially for the dilation of the younger man’s eyes, the subtle changes in his face, the tension of his body. Finally Bruce let a pleased, confident smile curve his lips watching as Calvin gave him one in return, the younger man’s lashes fluttering a little; more mental pleasure there than physical.
"A different color is needed, I believe." Bruce mused, tugging Calvin even closer, leaving them chest to chest, sharing the same air. "As far as practicality, I believe further testing is necessary."
Calvin let out a thoughtful hum, the amusement never leaving his eyes despite the fact that his voice was hushed, his words spoken practically against Bruce’s mouth. “Hmm. I believe you’re right.”