You’re on a date. The guy opposite of you seems attentive, interested, and personable. But there’s something not quite right. Maybe he’s commenting a little too much on the décor of your date venue. Perhaps he’s got a lot to say about the menu or is critiquing the clothes of passers-by. And when he asks you again where you’re from, your age and appears to make a mental note of your eye colour, you need to beware. There’s every chance you could be sitting across from the scourge of the...