Lisa Rinna Talks Sex, Plastic Surgery, and Depend Ad

Actress Lisa Rinna is not one to shy away from uncomfortable topics. The "Days of Our Lives" star has talked frankly about plastic surgery, filmed a commercial for Depend incontinence products, and even wrote about losing her sex drive after childbirth in her 2008 advice book Rinnavation. In fact, her latest project, a book called The Big, Fun, Sexy Sex Book, co-authored with sex therapist Ian Kerner, is a handbook for getting the most out of intimate relationships — something Rinna, 48, thinks we should all discuss more. "We talk all day long about diet and fitness, eating healthy and working out and skincare and this and that and the other thing, but we really don't talk about sex and how important it is in keeping a relationship solid, and how important it is for your health, so I thought why not?" Rinna told omg!. "I love to talk about things that are taboo and you're not really supposed to talk about anyway, so there's no reason why you can't get really good information out there."

[Related: Would You Take the 7 Days of Sex Challenge?]

Of course, not everybody's as open as Rinna, including her husband since 1997, "L.A. Law" actor Harry Hamlin, who she said would never write such a book. "Of course I talked to him about this before I even did it, and I think after 20 years of being with me, he knows that this is the road that I go down, so even at first if I say, 'Hey, I'm going to do this. What do you think?' and he's like, 'Oh my God' ... in the end he knows how valuable it is," Rinna said. "And I certainly don't share anything that would put him in a compromising position. After everything, he's really good with me doing whatever my passion is, which I certainly think makes for a perfect partner. He's supportive, he's very supportive." She added, "That's probably the reason we stay together is that we're complete and utter opposites."

So it's no surprise to learn it was Rinna's idea to film an ad for adult diapers brand Depend's new Silhouette for Women line in which both appear. Rinna, who actually doesn't suffer from incontinence, explained that she did the ad because the company was willing to donate $225,000 to her charity of choice, the non-profit Dress for Success, which provides professional clothing and career training to financially struggling women. And just like with the book, she's showing people how to feel better about themselves, turning "something that people feel shame about and are embarrassed about" into a problem they can solve. "I think what I've learned along the way is that if you feel good about yourself, your self-esteem is going to be high, and that's the key," she said. "You've gotta feel good about yourself, because if you don't, what you put out into the universe is negativity."

Rinna's mantra is that if women think they look good, then they'll feel good. To help with that, she's launched the new Belle Gray by Lisa Rinna fashion line for QVC, which consists of casual chic clothing, and is named after her former L.A.-area Belle Gray boutiques, which borrowed her two daughters' middle names. She's even used that look good, feel good rule in her own life, relying on plastic surgery when she felt it was warranted. In 2010, she had a surgery to reduce the size of her lips after she had silicone put in the top one in the '80s and scar tissue developed around it. She's also spoken about using facial fillers in the past, but she said these days she's more about taking care of her skin and living a healthy lifestyle. When it comes to doctoring her appearance, Rinna said she's "tried it all, not a fan of it anymore." But she doesn't regret it. "I don't regret anything," Rinna revealed. "I think we all try everything, everyone's tried it. If it works for you, great. If not, you move on. I mean, every actress has done it, pretty much." However, very few are willing to talk about it, she noted. "The people that aren't honest about it, it's a little bit easier for them, I think."

[Related: Lisa Rinna Talks About Returning to 'Days of Our Lives']

As the years go by, Rinna said she's even more comfortable in her own skin when it comes to appearance and everything else. "Like any other woman, I think I'm learning to accept myself at any age, and you know, it comes with age and wisdom," she shared. "And I'm much more accepting of myself now than I was in my 20s, so I think that's a good thing."

Lisa Rinna's The Big, Fun, Sexy Sex Book hits stores May 1.

More Celebrity Features on Yahoo!:

Follow omg! on Twitter