The one reason why I don't regret Y&I as a single:

[Gagz 2,572]

You And I was a great single choice. It's one of her best, most versatile songs.

I don't think Scheisse would've done that well. The hook isn't in a real language, it's not easy to sing along to, and feminist songs can be alienating to male audiences. Hair probably would've done okay, but probably not as well as Yuyi.

But yes, Taylor is just another great reason.