This will sound familiar to all disappointed Casanovas out there: You’re sure you’ve successfully charmed the pants off the girl when she agrees to come to your place for “one last drink.” But just when you think things are going to get hot and heavy, suddenly she’s mumbling about an early meeting, giving you a platonic kiss on the cheek and bolting before you get anywhere near her pants, leaving you wondering where it all went wrong.

So why couldn't you get her into bed? Whether it’s being overall clueless or making one dumb comment, it's surprisingly easy not to realize you've made a misstep. “Let’s face it: In a society with a plethora of online dating sites, speed dating opportunities, and new dating technologies emerging nearly every month, women are more focused on ruling men ‘out’ than ruling them ‘in,’" says expert Marni Battista, founder and CEO of Dating with Dignity.

To investigate the missteps you might be making without even knowing it (and to prevent you from doing them again), 10 women told us of times they were this close to sealing the deal with a guy…and how he blew it. Don’t repeat their mistakes, gentlemen.