Passion coach Eryn-Faye has posted three polls on her blog.
How often do you go on a date with your spouse?
How often do you and your SO talk about sex?
Who initiates sex more often?
All good questions anyone in a relationship should be thinking about. Go to Eryn-Faye's blog and take the passion poll, then see how other people answered.
I think my basic answer is "not often enough."