John fished a sachet of lube from his pocket with his left hand, and tore it open with his teeth. Working quickly, he slicked up his own cock, then used his lubed fingers to work into Spike's ass, stretching him out. When he was done, he rested his head on Spike's shoulder.
"When you're ready. Onto your hands. I'll keep my wrist to you, yeah?" he murmured, before he bit down hard at the juncture between Spike's neck and shoulder. John may not have the fangs, but he was betting that Spike wouldn't mind a little violence with his sex either