Neighbor romance is so good for secret trysts because the geography forces a kind of double life. You’re literally sharing walls or fences, so every interaction has this public-facing layer—borrowing sugar, complaining about noise—that can flip in an instant behind a closed door. The tension isn't just about hiding from the world; it's about hiding in plain sight, which feels more perilous and thrilling.
I think the best ones, like some moments in 'Walls' or even the suburban tension in 'The Girl Next Door', play with the constant risk of exposure through mundane things. A misplaced earring, a car parked too long, a nosy neighbor who notices patterns. It’s less about grand secrets and more about the tiny, heart-pounding logistics of maintaining normalcy while your whole world is upended three doors down. That daily dance of proximity and pretense is what hooks me.