Who Is This

My two sister and I were all away at various colleges at the same time. One day, after facing one crisis too many and tired of being treated like just another undergraduate, I phoned home for some consolation and understanding of my unique problems.
When my dad answered, I immediately launched into my litany of frustrations with college life. As I paused to catch my breath, he said, "O.K., honey...now, fist of all, who is this?"