Will my boyfriend be angry if he knew i have looked at his ex-wifes profile on Facebook?

[Pickle]

Out of sheer curiosity, i sneeked a peek at my boyfriends ex-wifes facebook profile.
I did this out of sheer curiosity just to see what she looked like. Was this wrong of me? If i told my boyfriend what i have done, will he be angry?

And seeing her picture has made me feel a bit sad and uneasy. Why is this?
She isnt what i expected - she isnt ugly - but she wasnt what i was expecting either. Hard to describe, but i guess i was expecting a slim petite woman, and this lady is quite striking looking with a tall figure and she wears glasses.

Why do i feel wierd seeing her picture???