Titus is a man transported to Equestria by unknown means. Well actually technically it's all starlight glimmer fault. But he doesn't know that.
From the Privet diary Records of Titus Oceanus
Princes Celestia has given me the title of ambassador of humanity. Most likely to hold me over until I can learn more of her and her peoples culture so I may get a real job. I will do my best avoid that at all cost.