My boyfriend wants to watch the birth.... but I'm totally against the idea of him seeing our baby's…

My boyfriend wants to watch the birth.... but I'm totally against the idea of him seeing our baby's head pop out of my vagina. I'm afraid he will never be able to look at it the same way again and possibly not be able to get aroused with that image implanted in his mind -- is it incredibly cruel to deny him looking at his child being born? I'd rather have him where my head is and hold my hand!