Textaholics

I will be the first to admit my addiction to texting. I've never been a fan of talking on the phone, and it's a lot easier to ignore people you don't want to talk to through texting.
On average, I probably use about 1,500 texts a month. Not a lot, but probably more than average.
I've had months where I've pushed 5,000 texts, but that doesn't happen too often now that I'm working a lot.
My sister, however, is a complete textaholic. In one month's time, she has accumulated 17,566 text messages.
What. Just. What.
How can you possibly have that many people to talk to? Or that much to even say? I honestly cannot wrap my mind around that.
If you do the math, that breaks down to about 1 text a minute for 14 hours a day, for 30 days.
That is absolutely insane. If we didn't have an unlimited text messaging plan (AT&T had no idea what they were getting into when they gave us that), my sister's texting bill alone would cost more than my parents' MORTGAGE.
I am baffled.