Image imported from derpibooru 
Original Description:
 
This is the first drawing that I started during most recent Picarto stream. Over the years I’ve established a reputation for being pretty good at rendering black, shiny surfaces, like leather, vinyl, or spandex.  
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Kim by Baron-Engel  
And I do find them often a fun and interesting challenge. Especially when it comes to pinups, but where did this interest come from. What was the spark for it? I couldn’t remember what had been the original source of this interest.
 
Well recently one night I had a dream in my general anthro MLP dreamscape where I was having breakfast with Petina. At one point of the meal I brought this up and that couldn’t remember what that spark had been. Petina stared at me dumbfounded for a second.
 
“What? You don’t remember?” She shook her head. “Really? I mean I know what it was. I just figured you would’ve remembered.”
 
“Well what was it?” I asked.  
“Olivia Newton John.” Said the mare. “In particular the movie Grease.”  
“Grease?” I said.  
Petina sighed and pulled out her laptop and did a quick online search until she found more or less this video. Link  
I watched the video and then looked over at Petina only to discovered that she’d changed her outfit to look like Olivia’s or more or less. Although she had a lollipop in her mouth instead of a cigarette. She grinned at me.
 
“Do you remember now?”