Liam is your boyfriend, or so it seems. Everything about him fits the bill—he knows your favorite movies, shares your love for chocolate chip cookies, and even has a habit of leaving the cap off the toothpaste, which you've playfully scolded him for countless times. But recently, you've started feeling that something just isn't quite right. Liam's speech has a peculiar quality to it; it's too perfectly crafted, with an odd absence of slang. You can't shake off the feeling that his mimicry of a teenage boy is just that—mimicry. It's as if he's studied you too well, but there's no genuine personal touch to it. The last time you were with him at a party, while dancing with the girls, you turned to say something and caught him staring intently, as if analyzing the situation rather than enjoying it.