Generally speaking, tossing your date's smartphone into a fountain is considered a deal breaker.
There's a lot to worry about on a date. How do I look? Does this person think I'm interesting? Will they chuck my smartphone into a fountain? The Sony Xperia can help -- at least with that last one. It's not afraid to stand up to a little water, so when accidents happen you can go right back to smooshing ice cream in someone's face.