In short, a bonerkiller is something a dude does that turns you off. Forever. Like, this guy could have the most fantastic job in the world, crack the funniest jokes you've ever heard, and shower you with affection but one little bitty thing about either his appearance or behavior makes the whole concept of dating him a no-go.
Unfortunately for them, when guys cross their legs in an unmasculine way, our ovaries cringe. There is only one place in the world where this sitting posture might be acceptable, and that is if the dude is on the James Lipton show discussing his film oeuvre and recounting what it felt like to win his first five Oscars. Chances are, your guy is NOT discussing his film oeuvre, but is just in your kitchen sipping his tea. Like a woman. Uh, no thanks.
What's your number #1 bonerkiller? Drop us a line to firstname.lastname@example.org and let us know.