A hot but down to earth girl who makes a great 'couch companion', someone both fine and fun, equally able to be insanely sexy or low key and comfortable, usually at the same time.
A girl who appears to be willing to have sex simply becuase she is a female who likes a guy.
Usually, sexable girls aren't even willing to do it. Guys just assume they are, so they try,and usually fail.
Girls who are looking for relationships oppose to just messing around are known as "Not sexable".
Kelly: Josh.. I really like you. I think that we have the potential for a great, healthy relationship!