On the subject of amounts of e-mails, what happens if you don't have any? Could that be a problem when applying for a visa?

At the minute, my lady and I talk on the phone for a couple of hours every few days, chat online more or less every other day, and text every day (ok, I guess I can't really prove the texting!). What I'm saying is though, that our contact is so regular we haven't really needed to e-mail each other!