I read an article about a scientific formula for falling in love, and it got me thinking. Basically it's a guided discussion comprising 36 "get to know you" type questions, followed by 4 minutes of constant eye contact. What I wondered was how much of this you could sort of weaponise and deploy against an unsuspecting person if they weren't playing along. Several of the questions ask for each partner to share something in turn, such as a positive observation about their partner, which you might not be able to do to a person who wasn't knowingly participating, and the uninterrupted eye contact would be hard to pull off on someone unsuspecting. Still, some parts could definitely work.
The catch is that this isn't designed to elicit one-way affection. The method is designed to pull two people close in mutual affection, so attempting to use this as a way to just get laid will only work if you're a psychopath.
Mokalus of Borg
PS - I'll be trying this my wife for Valentine's Day.
PPS - I might let you know how it goes.