Nick Chester, store manager and creator of the Twin Tracker, which cross-references the age of the Olsen twins with the age of legal consent with each of the 50 states of America. He says he had plans to update the site as the years passed and the Olsens' birthday approached, but subsequently lost interest in it -- especially after receiving a cease-and-desist order from the Olsens' lawyer, demanding him to take the girls' images down from the Twin Tracker site.

It's hard to give the Olsen Twins advice on what direction they should take now that they're turning 18. Soon they won't be able to get away with making corny, faux hip-hop videos about the plight of high school crushes or plaster their faces all over boxes of third-rate beauty supplies, and that can be quite a problem, no?

One viable option is to astonish the world and ring in their newfound "sorta kinda adulthood" by going all out and giving the people what they want: a Hustler spread. On the other hand, and more seriously, if they ever do intend on being taken seriously as actresses, they're going to have to do some projects independently. Because until Mary-Kate releases a solo record or Ashley lands a role in which she doesn't have a twin sister, they're still the Olsen twins and not individuals. Because at this point, it's just getting creepy.

Annie Sprinkle, prostitute/porn star turned sexologist, educator, multimedia artist and utopian entrepreneur. Her new documentary, "Annie Sprinkle's Amazing World of Orgasm," will have its world premiere in San Francisco's Frameline Film Festival on June 22.

My first piece of advice to these girls is to devote some time to learning about and understanding their sexuality. As I haven't gotten the sense that they're very sexually savvy young women, I think they would really benefit from a crash course on basic sex education. Sex ed will help them lubricate the difficulties of a such a huge, high-pressure career. In addition, these are beautiful young women. As they become increasingly aware of their sexuality, they will need to learn how to manage the power that comes with that.

These girls need to know that there is a treasure chest of wonderful possibilities for their sexuality. Aside from the obvious (sex is fun, it can improve intimacy, etc.), sex can help relieve stress! And I can't think of anyone who would benefit more from a little sexual stress relief than Mary-Kate and Ashley Olsen. Living in the public eye can be terribly demanding. They need to make time for personal, private pleasure, which is something I'm sure they're not doing right now (whether it be due to lack of time, lack of understanding, or lack of interest). At this stage in their lives and their careers, I think it would really benefit them to embrace masturbation, to practice reaching orgasm. They need to get comfortable with making themselves feel good on a daily basis, to help them feel prepared to face the challenges of their busy little lives. Personally, I've really come to value the orgasm experience in times of stress and strain. As they get older, the twins will probably become more and more orgasmic (while our culture values youth as sexy, women actually become much better lovers and much more sexually empowered as they age), but good masturbatory habits start now.

I am almost positive the girls are still virgins (just look at them!). And that's great, that's fine. Virginity is highly valued in this society. The Olsens should take their time and wait for the right time; they shouldn't rush things. The whole world is certainly watching, especially now that they're turning 18. While there are benefits to being a publicly sexual person and to exposing that side of yourself, there is also a real beauty to privacy. Frankly, they'll be lucky to get rid of their virginity, but whether they are open about it or keep the secret to themselves is up to them.

Some 18th birthday gift ideas for the Olsens include "The Good Vibrations Guide to Sex"; "Sex for One: The Joy of Selfloving," by Betty Dodson, a private sex tutor; or a nice pair of vibrators.

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