The counterpart to textosterone. Found at varying levels in both genders of the human species, it is expressed at higher levels in women than in men. High levels of textrogen result in lots of abbreviations in texts, mass texting, and rapid texting, to name a few.
Girl #1: OMG so yday, I put my phne on the counter and when I got bak like 5 sec l8r I had 23 txts from Jane
Girl #2: OMG totes lolz so much textrogen!
Girl #1: IKR!
Girl #2: R! LOL!