Gary The Steam Engine in... Equestria?

After walking around in more circles Gary, Freddie, and Flying Scotsman went to "Sugarcube Corner." There were two Black (Phrasing) Stallions. The first one was panicking for no reason and the other was screaming.  The trio decided to ignore them. Gary walked up to the counter and asked for a cupcake. A pink pony jumped up and dragged Gary into a back room for sex. Later They appeared and Gary stated the most obvious thing

"I've got train AIDS..." Stated Gary.

"So?" Asked the pink mare.

Gary decided to get Freddie and Scotsman and GTFO, which they did.

"Now I know why those two stallions were screaming..." Said Gary.

"Why?" Asked Freddie.

"You don't wanna know..." Said Scotsman.