No Strings Attached/YMMV


 * Crosses the Line Twice: The period scene, particularly one line: "It's like there's a crime scene in my pants!"
 * Fridge Logic: Why do Emma's panties have buttons on the front?
 * Some kind of fashion?
 * You can get those fairly easily in the UK. IIRC they were originally a joke item parodying men's pants which then became actually popular for some reason.
 * Narm: The "I'm the guy she married Adam" speech by Sam was supposed to be a serious Breaking Speech, not a joke. It comes off like a cuckolded husband trying to act superior over the dude who his wife is cheating with.