Some of this is the result of our cultural prioritization of sexual acts that are most pleasurable for men , like vaginal intercourse. Oxytocin and dopamine are both in a class of hormones considered part of the brain's reward system, says Lawrence Siegel , a clinical sexologist and certified sexuality educator. As someone's body reaches orgasm, they flood their system because the brain is essentially trying to medicate them, Siegel says. For other women, this discomfort may come from medical conditions which may make it difficult to fully engage in and enjoy sex. But it wasn't just about the number of nerve endings -- some women said they enjoyed being touched in areas of their body that they feel particularly confident about. So it's not really surprising that when it comes to heterosexual sex , women still don't always get an equal opportunity to have a great time. Woman don't moan only for an orgasm, we moan and even scream because sex is a sensory overload not just because of an orgasm. For some women, pain or discomfort during sex can be the result of couples prioritizing vaginal intercourse over other sexual acts. I never thought I would say that but you can actually tell the difference. The responses ranged from the mouth to the ears to the arches of the feet, which one reader attributed to the 7, nerve endings we have down there. While we don't know what makes someone asexual, it's pretty certain that there's no physical difference between asexual people and everyone else, Siegel says. Using a water-based lubricant like Lubafax, K-Y Jelly or Astroglide can help make the vagina more slippery during intercourse. Then of course, there are specific conditions that make sex legitimately painful, such as vaginismus , which causes involuntary muscle spasms around the vagina, making it tighter and even closed at times.