Women are Emotional Creatures, and the Orgasm is an Emotional Experience
Men simply don't experience orgasm the very same way as we do, therefore they are FAR more likely to feel JUST the physical phenomena that correlates with the experience. Alternatively, women simply FEEL the intensity of this sort of intimate release in ways that FAR transcend the physical, which brings a flood of all kinds of things to the surface....including tears of emotion. Which is usually a sign she's feeling close to you to boot.
But sometimes it can be......
A sign of guilt! Or shame. Or even embarrassment. Everyone has their own "stuff" and baggage, and often times crying during orgasm is a sign that she may have issues regarding any of the above. Do you know her well? Are you in an exclusive relationship....or might she also be intimate with someone else? Often times women have guilt issues as they pertain to sexuality, and this sort of response is a textbook reaction to not feeling worthy of having had a VERY pleasurable sexual experience.
As always...the KEY is to ask and find out! Trust me, nothing is sexier than a man who wants to know.
And One Last thing.....Remember
Women admit that they would prefer a man who COMMUNICATES passionately during sex ( which means she wants a little lusty dialogue, they want you to learn the landscape a bit better ( understand her body ) and they PREFER a man who has a powerful anatomy ( a thicker penis is preferable ) You can improve all three of these with JUST a little effort and in my experience, the REWARDS they offer are EACH worth their weight in earth shaking orgasmic gold.
The above information thankfully comes from the dosupersex.blogspot.com at the following link.