New Position -- Sitting

Without even pulling out, Donnie leapt back into the office chair several feet away. Now in a sitting position, Casey felt Donnie's cock tuck itself farther in.

"Donnie! Warn me next time you're gonna do that," said an annoyed Casey.

"S-Sorry," said Donatello.

While Casey was atheletic, he was surprisingly lanky under all of his vigilante equipment. That combined with Donnie's daily training since a young age and Casey weighed barely anything as he lifted and lowered the human over his cock.

As annoyed as Casey was with the sudden acrobatics, he had to admit it was the right call, as this new position made it so that he could feel Donnie's cock rub against a nerve inside of him. As Donnie pumped in and out of him faster, Casey wrapped a hand over his own cock and started to stroke it. As dexterous as Donnie was with his three fingers, they were too big to give him a proper handjob. He was too busy using Casey like a flesh-light to bother.