Joe Steel cracked the Tesla car code on Twitter earlier today.

Turns out he was right. USA Today reports:

CEO Elon Musk told shareholders Tuesday that a friend joked to him that with the S and the X, all Tesla needed was the E. “It kind of stuck even though we were just kidding.” The name Model E was talked about as the designation for the third model. Then, “Ford called and said they were going to sue us for using ‘Model E,'” Musk said. “They are killing SEX.”

Ford is no fun and has no sense of humor.

But, it’s still a shame that the S-E-X naming structure was never, um, consummated. Musk says the company even took a trademark on Model Y.

RIP SEXY car line. Long Live S3XY car line.