NOW I know why I used to love that TV show so much!  "Winnie Cooper" can't seem to keep her clothes on. Wonder Years star Danica McKellar has stripped down to her underwear for a sexy photo shoot in Maxim, four years after doing the same thing in Stuff magazine.

The 35-year-old tells Maxim, "I've always been really cautious about guys who have a Winnie Cooper fantasy, and I'm so glad about that. I mean, I can count on one hand the guys I've been with. It was really challenging, but I never gave it up too soon, if you know what I mean."

McKellar, who got married last year, is expecting her first child in the fall.