At the age of 50, I did "Celebrity Fit Club" and I had to get on a scale and be weighed in front of everyone. I felt like I was naked and for the first time, there was nowhere to hide. I felt like I could finally be myself. It was really cathartic, and I realized I could share my mistakes. I could tell my story and not be ashamed, and show others with these same problems that they aren't alone.

This thing in society that you have to be a stick will always be in my mind, but that's just something I have to deal with.

There were also other things, but this was a big factor. It's sad, because she [Eve Plumb] was my best friend. We went through a lot together.

I get it all the time; I just have to laugh and enjoy it. People enjoy it so much, coming up to me saying "Marcia, Marcia, Marcia." If people are having fun, I'm having fun. It used to bother me a lot right after the show.

I was actually losing about a pound a week which was really wonderful. It was a really nice, and good, and healthy way to do it. And I still got to eat my chocolate every day which was wonderful, although I haven't had a drink in a really, really, really long time. I love being outside and working out, and I sometimes jog with my husband, and sometimes I jog with one of my daughter's best friends, and it's incredible. I was able to do Pilates for the first time in my life, which is almost better than sex. Not quite, but almost.

There have been so many jokes, about sex and relationships on the "Brady Bunch" set. For some reason, tabloids picked up on this Eve thing. I was on a late-night show and I said, "Oh, yeah, I've kissed her."

Stars now also have problems with drugs, and it can be even harder being so out in the public eye - it's hard for them to keep their sanity and normal self present, but they can do it.