Spike snuggled close in Discord's fur,enjoying the warm embrace. Being a dragon, the heat off of Discord's body felt amazing. He began purring, a extremely rare thing for him. 

"Oh, are you a cat now?" Discord asked,curiously.

Spike blushed," N-no...I-its rare for dragons to purr,but we can do it...i-its only when in extreme comfort..."

"Oh, I see,"Discord smirked,rubbing Spike's back," So, I make you comfortable?"

Spike let out a little moan and shivered in delight,"Y-you do..."

Discord chuckled," Does that feel good?"

Spike nodded," S-so much better than hooves..."

There was a knock. 

"Wh-what are you two doing in th-there?" Fluttershy asked.

"Flutters, I dont think they're doing what you think..."

"I-I heard Spike moan..."

Discord snapped his fingers, causing the door to open," Wow Fluttershy, why would we resort to THAT?"

"I-I don't know..."

"Gah, Spike is just sensitive,right Spikey?"

Spike nodded, still enjoying the pleasure from the rubbing.