Same here. I was actually talking to a girl last night who laughed at almost everything I said... then later admitted that she didn't know what I was talking about... Stupid girls.
i love being around people who smile, but people who smile for absolutely NO reason ALL the time come off as airheads to me. i'm not sure they know what's going on half of the time. you can be like, "hey, your car just got stolen and somebody ran over your box of puppies..." and they'll just look at you and smile. fake smile.
...even though i smile for no reason sometimes. lol i'm just a really happy person sometimes, though.