The 35 year-old virgin?
When you think about it, it's likely she was a virgin. She was blinded at age 8, in a very traumatic abusive way. She was obviously messed up.
So do you think sex with the detective was her first time? She even mentions that she never felt beautiful even when she could finally see herself, because she doesn't even know what beauty is supposed to look like (not to mention the fact that she realizes she looks just like her mother).
Then after she has sex, she is pretty clingy with the guy (luckily he's already crazy about her)
To me it seems like typical teenage virgin behavior, clinging to her first "love"
The movie kind of glossed over it and made it seem like sex was the most natural thing in the world for this woman, more natural than navigating a train car in Chicago or a staircase, apparently. Seemed a little odd to me.....