From both our personal experiences of our own varied sex lives, and in our work in sexuality with many other people, it seems pretty clear that really letting someone into an internal space in your body, or going into someone else's insides -- which we know might sound a little gross, but that is what's going on with this stuff -- is a fairly big deal for many people. So, what might make sexual entry different from other sexual activities?

Freaking out because you think something must be wrong with your labia? Think again!

What are breasts made of? What's normal for nipples? Is something wrong with me if my breasts aren't sensitive? Can women who aren't pregnant lactate? Do I need a bra? Why aren't my boobs bigger? Sit back, take a load off and have a read for these answers and more.

The Fertility Awareness Method (FAM) is a means for women to observe the three primary fertility signals: cervical fluid, waking body temperature and cervix changes so that you can be as in-the-know as possible when it comes to your own fertility and menstrual cycle. Find out the basic how-to so you can make the mystery of your own fertility cycle become a lot less mysterious.

It’s typically assumed that sex and gender are the same. They’re not. What's gender all about, then? What is the range of gender and gender identity, and how does gender impact our lives and how we live them?

Your menstrual cycle and your reproductive system have held people in awe (or perpetual duh, depending on how you look at it) for thousands of years. Follow us through a tour of how it all works, how to best manage it and use it to empower yourself, and find out what it means now and has meant to others in the past.

Puberty is the process of physical changes and sexual maturation leading to sexual maturation as well as complete body growth. During puberty, your whole body goes through growth spurts until it has become physically mature in terms of bone mass and size, and the sexual organs and secondary sexual characteristics develop and mature. Chances are, if you're at this website, you have likely already started puberty.

Throw a rock at any sex education site or service, ask what the most common question we get is from men and we'll all tell you that it's about penis size. We don't imagine with this piece we'll never get asked again, but we're hoping these answers get you guys better filled in so you can feel good about yourselves, your penises and whatever you do (or don't) do with them.

If we're going to think of our genitals as big, any one of us, given the small range between them, we should think everyone's genitals are big. We also need to accept that it's ignorant or misinformed to think, presume or suggest that penises are big but vaginas are small, because we really are all about the same size. If thinking big is better for one sex, it's also got to be better for the other. So, if you or someone else is going to go on about some big penis, you'd best get just as excited about the idea of a big vagina, and make having a big ol'Vagowski just as cool. And if you're all hung up on the idea that the vagina be as small as it can possibly be, or is such a small thing, then you've got to accept that penises are small, too.

What are the early symptoms of pregnancy and when do they start to happen? Why are symptoms not the smartest way to tell if you're pregnant, and how CAN you tell if you are? If you're losing your mind during a pregnancy scare, and finding symptoms everywhere you look, here's some on-target information and a dose of comfort to help you separate the real deal from the hype.

Menstrual suppression is becoming increasingly popular, and has been widely promoted for women. For some, especially women with reproductive health issues which are helped by suppressing periods, it's an obvious boon, and some using it electively also report it to be a blessing. But what about the health risks? What about the attitudes informing that choice which cheerlead suppression by maligning menstruation? What about the benefits, emotional and physical, our periods can offer us? An opinionated, no-holds-barred look at the whole works and a paean to the period, no matter what a woman chooses to do with it.

The problem with asking how someone else how to do something that's just for and about yourself is that you know better than anyone else. But we can certainly fill you in on some basics. Includes the skinny on masturbation and UTIs, bleeding during mastrubation and on finding masturbation just isn't doing the trick.

A big part of keeping yourself sexually healthy is maintaining your sexual and reproductive health in the first place, and paying attention to your sexual health daily so that you can get the jump on any problems that may crop up.

If we look at our sexuality one way, it looks a million times simpler than it actually is. If we look at it another way, it appears a million times more complicated. While it's important that we bear everything in mind we need to in terms of infection and disease, birth control, our relationships, our bodies and the whole works, now and then we need to remember the bare bones and the human element of the thing, and keep the essentials in the forefront of our minds.

Vaginal discharge and secretions are a normal, healthy part of your reproductive system. The vagina -- which is not the whole of your genitals, that's called the vulva, but the flexible tube behind the vaginal opening and inside the body -- is a passageway between the outside of the body and the internal reproductive system. The pH balance of the vagina is acidic, with "good" bacteria, by design, which helps keep infections away. Vaginal secretions are how the vagina cleanses and regulates itself -- how amazing is that? -- in the same sort of way that saliva helps keep your mouth clean and healthy.

Looking for an alternative to tampons or pads? A user asks about menstrual cups, and we give her -- and you -- the scoop.

Keeping up-to-date with your annual general and sexual health checkups with your healthcare professional is key, but so is the preventative care you can manage all by yourself. Find out how!

Everything I needed to know about body image I learned in a bathroom in the seventh grade. Well, almost everything.

For a long time, I've been hearing about something called a circumcision, and I know it has something to do with the penis, but I'm not quite sure what happens to the penis during the process. Can you please explain it to me?

But before you run out and get a lovely bit of metal in your eyebrow, or a gorgeous portrait of Bugs Bunny indelibly inked onto your shoulder, take a moment to read up on body modification, and make sure you know what it's all about. Tattoos and body piercings can be a great way to express your individuality, but they're permanent, after all, and not without health risks.

I was about 14 I started to realize that only one of my breasts was developing. That's weird, I thought. Oh well, puberty is weird, bodies are weird, it will all work out eventually. I was about 17 when I realized it probably wouldn't. Damn. Somehow I had ended up with one D cup breast and one A cup breast. Imagine, if you will: at this point I am a dancer. I am a teenage girl. I am sexually active. I am utterly mortified. Sort of.