Text Messages: What's the point?

A recent study found that cell phone users between 18 and 24 years of age exchanged 109.5 text messages per day! 

I wonder how many "OMG"s and "LOL"s are texted.

I wonder how many repetitive strain injuries have developed.

I just text occasionally if I'm looking for someone, or contacting someone whose cell number is long distance. But 109.5/day? Yeesh. 

Okay, frequent texters, please tell me: what the heck are you saying in these texts and why you send so many of them?