My exp level is 4472 at Level 7 and I can't take more than one photo either. And the satisfaction bar never goes to the top, even though I answer all the questions correctly, get the smiley face on touching and kissing. I get the green light..take one photo and can't take any more after that even after moving the camera.

You're playing at Lesson of passion, right ? When you have the green light on the camera, click and hold the left button : a white bar rise up on the screen of the camera. Then release the mouse button when white bar is higher as possible (take care, when bar is to the top, she'll goes down).
If right, the satisfaction bar is full. End the date, and you'll have new choices (erotic photo session and make sex).
Have fun !