Sometimes, you just want it hard and fast.

And the same goes for becoming sex-savvy in seconds. The following sex facts will help satisfy your desire to be in-the-know via instant gratification.

1. Prepare to have your mind blown – literally.

Reaching the “Big O” can feel like your brain has blown a fuse. With that three-pound brain of yours being the seat of your orgasms — PET scans have revealed that several parts of the conscious brain shut down during climax. And as luck would have it, one area of the brain that "switches off” is the part that controls fear and anxiety.

2. Opt for chocolate.

Research out of the U.K. found that this sweet treat causes a more intense and longer lasting “buzz” than kissing, doubling one’s heart rate.

3. Before reaching for that Viagra …

Consider that ejaculation and orgasm don’t require erection. According to "The Science of Orgasm," a penis can be totally flaccid, but a male can still experience emission and climax.

4. You may just have to become a feminist.

Feminists do it better. According to a Rutgers 2007 study, feminists have better sex and relationships.

5. It’s not always sexy to be a Casanova.

Like her, he may want to think twice before sleeping around. Sex with multiple partners can increase a male’s risk of cancer and other diseases by 40 percent.

6. Second-guess the circumcision-cancer connection.

While the U.S. medical establishment claims that circumcision prevents cancer of the cervix, British doctors say it ain’t so. The Brits point to the fact that women in countries where men aren’t circumcised have no higher rate of cervical cancer than women in America. Not surprisingly, less than 10 percent of newborns in the United Kingdom are snipped.

7. When “getting some,” play selectively hard-to-get.

According to reinforcement theory, our attraction to another is based on the ratio of the number of positive reinforcements a person gives us versus the total number of reinforcements and punishments given.

Bottom line: People who are frequently nice are more likely to win over a partner.

8. Tampering with one brain system tampers with another.

More than 100 million prescriptions for antidepressants are written yearly in the U.S. Yet users end up trading in one dilemma for another. These SSRIs suppress one’s dopamine circuit, killing your sex drive and orgasm and attachment abilities.

9. Socioemotional meanings are conveyed in human sweat.

Huh? All you need to know is that a recent Rice University study found that women process and encode sexual meanings from the sweat of men. The brain recognizes chemosensory communication in sizing up sexual quality.

10. Bisexuals are likelier to use both hands.

Research in Psychological Bulletin reports that bisexual men and women report particularly high levels of ambidextrous hand preferences.

11. A sneeze may indicate sexual arousal.

A study in the Journal of the Royal Society of Medicine suggests that a mix-up in brain circuitry may send an individual into a sneezing fit at the thought of sex. Researchers also learned that certain individuals sneeze after orgasm.

12. Bisexual women take more risks.

Research out of the Guttmacher Institute found that bisexual female college students are likelier to engage in risky sexual behavior than heterosexual or lesbian women. Data on nearly 30,000 females 18- to 24 years old also revealed that bisexuals are likelier to have had a sexually transmitted infection in the past year.

13. Her brain responds more strongly to masculine faces.

Researchers at Indiana University’s Kinsey Institute report that a female’s brain reacts differently to masculinized and feminized faces, especially when she’s closer to ovulating. The area of the brain activated is the anterior cingulated cortex, the region involved in decision-making and the evaluation of potential reward and risk.

Dr. Yvonne K. Fulbright is a sex educator, relationship expert, columnist and founder of Sexuality Source Inc. She is the author of several books including, "Touch Me There! A Hands-On Guide to Your Orgasmic Hot Spots."

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