Man/girl thing? what was it?

So im 13 and i masturbate to girls. i saw this video though, and i clicked it, i thought it was a girl but as i looked closer i could tell it was a man!!! low and behold this person had a penis too! it was the wierdest thing what the hell was this like a man who got boobs and changed the way his butt looked. i did not find it very sexy it was just like scary... it was the meanest looking girl i ever saw! what do you call these people? like he/she's?