(NSFW?) Do you close your eyes when you kiss?

I realized last night that my girlfriend does not close her eyes when we kiss. She does close them some times, but for 90% of the time her eyes are open.

Since discovering this I have stopped closing my eyes, and I have to say, I like it more. We lean our heads back and maintain eye contact while we kiss.

I know the majority of people close their eyes while kissing, but do you? and if you do, have you ever tried not closing them? if so, what did you think of it.