According to this article from MSN, the Japanese Association for Sex Education conducted a survey of middle- to college-age students to find out sexual habits and found, among other things, that people who send more than 20 emails by cell phone (and I assume email also means text messages) per day have sex more often than those who spend two hours or more on the Internet on their days off. The article goes into more detail about the breakdown of the survey, if you're interested in the specifics.

To be honest though, as odd as the association of cell phone use and sex sounds, I'm honestly not that surprised that people who do a lot of texting get more love than those who geek out on the Internet all day. Think about it: who likes text messages? Everybody and their mother, including people who use their phones to score hookups. Who are the hard core Internet users out there? Besides the present company, it also includes people like these guys, who definitely aren't making gene pool contributions on regular basis.