She's a mousy librarian. i'm shocked.

I'm a librarian in a large city library system. A fairly new employee so they got me floating around the city filling in for people out sick or on vacation. Last week I hit on this mousy young girl with a pair of thick glasses and a hot thick body. Sensational ass. She just broke with her boyfriend so I make a date with her. I get her drunk and stoned on weed and get her in my place that same night. It was if she had been unleashed from some kind of bondage. The woman was wild. She even had me eat her ass, which I was hoping to do anyway. Is this normal for nerdy, mousy looking young women? What have I been missing?