What's the big deal about Northern vs Southern candidates?

[FHwku]

Historically, haven't the majority of presidents been elected from the South? Southern states (i.e. the "Bible Belt") seem to be more conservative in a lot of areas, one example being the issue of gay rights. e.g. no states come to mind when i think about "rebel" politicians marrying same-sex couples except in a couple Northern states. whereas here, it'd seem to be unthinkable to a lot of people. common regional values that might differ, on the whole, from states north of an invisible line. like not being able to find sweet tea north of the Ohio R.

*i just think that's one aspect that might contribute to the importance of winning the Southern states, and why the South is considered separately as a chunk of votes. if i'm wrong, correct me without making me seem like big ol idiot. *