Do you get hot off girls versus guys? Do you wish it were a girl between your legs and would rather be kissing a chick? Would you rather rub on a chicks silky body from head to toe than rubbing a burly hairy man? Then you might be a lesbo.
However, you can like both and be bi-sexual.
Here check this site out.
http://www.lesbian.com/
PS. Pic above does not illustrate all pussy. (EWE, ICK) Otherwise, how would we make money off porn.