Though perhaps not as fast as ZEX's, Zelnick's heart was picking up its own pace, thumping along cheerfully and mixing with ZEX's voice in his ears. ZEX, who was too good at sounding really really good, and far too good at making Zelnick maybe want to hear a little more of that kind of noise, something he could probably do if he pressed ZEX up as close to him as possible and kept on (gently) attacking ZEX's neck, and petting the rest of him. Being so obviously appreciated made him feel good...