Tis a movie. There are two people, pre-teenish, and they're on a plane, right next to eachother, and it seems their parents aren't on the flight with them. I think they're flying off to nerd camp, or they meet later in the future at nerd camp, or they met eachother soem time back at nerd camp... I thiiiink the girl might be latina. but for some reason she's telling this guy that she's on her period(first period?), and she seems to be really happy about it.
That's -it-. that's all I remember.
edit: consensus seems to be Boys and Girls. I guess all i really remembered from that was 'hunter'.