The other day I remembered an article I read once about the history of the MLP series, particularly the Big Brother ponies. Then I saw the photos... it turns out that they all looked like members of the Village People.
Exact same color schemes as the girl ponies, just scaled up. Also, Big Macintosh's old predecessor happened to be yellow, pink and purple. The rest is self-explanatory.
...Yes, I am a total brony. FTW.
My Little Pony © to Hasbro.