E.T.'s Extra Testicle

Alright, listen up, jimmidy cricket. You asked for this, and now you have to learn something. You think you're so funny with your space balls, but E.T. doesn't have balls! E.T. is a fictional character who looks like a deformed little man. Your joke is so dumb because it implies E.T. has genitals. It's a wordplay on "extra terrestrial" and "extra testicle." It's supposed to be funny because it's unexpected and kind of gross. You get it?