The robot thing isn't super common, it's uh, some guy worked out how to put a soul into a machine, so...

[So... robots? Ghost in the shell?

Let's move on.]

Tieflings are what happens when someone gets down and dirty with a fiend. [He waggles his eyebrows, because he's mature.] They usually have tails and horns, which actually isn't all that different from dragonborn, 'cept they've also got scales. But no one's really sure how they started out, you know? They've got dragon blood in them, but how it got there... [shrug emoji.]