There are lots of universe's of fandom out there including one for My Little Pony! There are thousands of adult fans of this genre that have websites and fan fiction and fan videos etc. Inside the My Little Pony world are a group of what they call background ponies with an hourglass for a cutie mark. A cutie mark is the symbol on the rear quarters of the pony that links to their power or personality.
There is one brown pony who looks like the tenth Doctor that has been nicknamed Doctor Whooves!
He has a huge following! Here is a cool Doctor Who fan video about him and his picture and a link to a list of all the hourglass ponies and who in Who fandom they might represent.