His own experience had no handy reference for this one. John had said, "Surprise me," the two worst words in the English language when one was deciding what to get their boyfriend for his birthday.

"Whoa," John said, looking at the simple band of leather - new and stiff and just lying there on the pillow. "You want me to..."

"Put it on," Rodney said.

"I..." John said, and Rodney thought he looked stunned.

"Come on," Rodney said. "For me?"

John picked it up and unbuckled it, struggling a little with the hard new leather. He looped it around his neck, then raised his chin for Rodney to fasten the buckle. Rodney left it a little loose, then stripped John's robe off and put him on the bed, hands and knees.

When he finally pushed his cock into John's ass, he kept his hand on the back of John's neck, lying over the collar.

"You like it?" Rodney pushed in hard, his hand holding the collar against John's neck, wanting to leave a mark - wanting John to remember this birthday.

"Yes, god," John said, his voice the same breathless whine as always when Rodney was buried deep, fucking him hard.

Rodney finally let John come, then pulled out and jerked himself off, coming on John's back. When they lay on the bed, sticky and spent, Rodney unbuckled the collar and handed it to John.

"Now go out back and put it on that stupid dog I got you for your birthday."