I don't know what it says that I still think bird instead of human anatomy when I hear/read tit. It's a split second but there's still a momentary confusion when I don't see a bird XD
If extraterrestrial visitors are smart enough for interstellar space travel they're probably doing nature docos on us.
I imagine a bunch of (purple titted) aliens sitting around the TV watching that doco thinking, these humans are crazy!
They'd be right.