Is vulnerability a turn on for girls?

So last week me and my girlfriend were making out at her place and before we got to the "take it to the bedroom" part she said that she wanted me to do something but was afraid to ask. Being that we're still a few weeks into the relationship I wasn't sure what but told her I was open to whatever. So she asked me to take out my contact lenses. My vision is crap. Without my contacts or glasses anything more than an inch away is just a bunch of shapeless blurs. She knows this. But I went into the bathroom, put my lenses in the case and felt my way back to the living room (yes, I'm THAT blind without them.) and playtime resumed. I didn't think I put in my best performance that night.Honestly it's the first time I've had sex without my contacts. I felt awkward and nervous because I couldn't see. I usually am whenever I can't. But she had no complaints. After I asked her why she wanted me to take out my contacts and she said that she wanted to see my vulnerable side.

While I prefer sex with my contacts in, I'm not opposed to doing this again but I'm wondering how much girls are into vulnerable? I mean is this normal or is my girl a special case?
Is vulnerability a turn on for girls?
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