The clitoris is much bigger than it appears to be from an outsider's perspective. And, since the chances are you are not a sentient vagina reading this, an outsider's perspective is all we have.

In Doctor Who parlance, it's much bigger on the inside. Yup. I just insinuated that your clit is a TARDIS. You can thank me later.

If you are a woman having an orgasm your clitoris probably helped you get there.

Ah yes, the clit, that mysterious hooded superhero who dwells in your Batcave. I just called your vagina a Batcave and I am so not taking it back. Though I will say I hope your clit did not have to watch as its parents were murdered in front of him.

Okay, the geeky parallels stop now: it's time for science.

In order to orgasm during vaginal intercourse, your clit has to be in exactly the right place. For many women, this isn't the case, and they have come to accept that in order to cum, they will have to resort to methods other than a dude performing the ol' heavy breathin' in and out.  

It turns out that whether or not we orgasm during vaginal intercourse is all down to a biological crapshoot. THANKS FOR SHIT MOTHER NATURE.

A report just published by The Journal of Critical Anatomy has found that a woman's clit must be less than 3cm away from her urinary tract in order to receive the pressure and contact necessary to climax vaginally.

Miss that marker, and bye bye big 'O', at least, bye bye big 'O' in this one specific way.

Because even if your vagina doesn't fit subscribe to this magical equation, that doesn't mean orgasm is impossible for you, it just means that this particular way is going to present challenges.

That just means you have to practice more and find a way of cumming that works for you. Awww, what a bummer, I have to spend hours and hours discovering my body and finding the most satisfying orgasm I can, SAID NO ONE EVER.