Hey guys, think you know everything there is to know about having sex with women? That erotic encyclopedia you carry around in your head may contain a lot of basic errors and omissions about women's sexuality -- errors that can lead to sex mistakes.

Guys tend to take a lot of cues from adult movies, and we all know how true-to-life those are. Experience may help, but many women can be shy when talking about what they like.

Here's the six mistakes you need to know:

No.1: You Know What She Wants
Men often make assumptions about what a woman wants based upon what they've done with other women. But women aren't all the same.

No. 2: You Have All She Needs
Some women can't have an orgasm with less than 3,000 rpm. No human tongue or fingers can generate that kind of vibration. But men typically think something is wrong if a woman needs a vibrator. Think of a vibrator as your assistant, not your substitute. Many couples use vibrators together.

No. 3: Sex Feels the Same for Men and Women
When a man has intercourse with a woman, and his penis goes into her body, that sensation is so off the charts for most men, they cannot imagine that it isn't feeling the same way for her. The inside of the vagina is probably less sensitive than the outer parts for most women. Also, deep thrusting may not feel so nice on the receiving end. If the penis is too long.

No. 4: You Know Your Way Around a Woman's Anatomy
Most guys know generally what a clitoris is and where to find it. That's not to say that they really understand it. Men also lack information about how to touch it and how sensitive it is. How can you find out how she likes to be touched? Try asking her.

No. 5: Wet = Turned On
Some women tend to get wetter than others, and how much natural lubrication a woman has can change from day to day. It varies by the phase of her menstrual cycle, and it's subject to influences like stress and medications.

No. 6: Silence Is Golden
A lot of guys think they should be silent during sex, but unless you speak up, your partner has to guess what's doing it for you and what isn't. If you're respectful about it, a woman who wants to please you will probably appreciate some directions.