Deal breakers: triggers that tell you that a date (or a relationship) has gone bad and you realize that there is no point in investing any more time or energy in it.
For many people, it's the kiss. I've heard that kissing can be a hint as to how they'll perform, shall we say, 'in the future' (if they ever get that far). However, I think it's like playing an sport; with some coaching and practice, you can get better at it.
Smoking would normally be a deal breaker for me. But, with the general consensus that it's a bad habit, I can see myself being the influence that helps them stop.
My biggest deal breaker is the laugh. I love to laugh, and I love to make other people laugh too. But if he has a laugh I can't stand (i.e. the dorky he-yuk or it sounds like he's hyperventilating), then my relationship monitor just flat-lined. I mean, laughing is something you do naturally and someone can't just change it unless they consciously make an attempt to do so - every time; but then it sounds fake and contrived.
Even if the physical stuff is amazing, a lasting relationship can't be solely based on it; we'd have to talk sometime. And if I can't crack a joke without bracing myself for the impending aural pain, then that's the deal breaker for me.
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