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We all love sex. If you don’t, you’re not doing it right. Have you ever thought of all the stuff that goes on in our bodies before and during sex? There are thousands of chemical reactions taking place in millions of cells helping you get it on and enjoy it. Not only does your partner work hard, but your body does, too. Give it some credit and turn to these ten amazing facts about the science of sex.

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There are chemicals working in your body before you even make contact with your partner. A neurotransmitter, dopamine is associated with feelings of craving, motivation, sexual desire and reward. When you’re near somebody you like, the body releases this hormone and makes you feel happy and blissful. It can also be released if you’re just looking at a picture of somebody you like. This is known as the “love” hormone.

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When a man is sexually aroused, it is actually his testosterone that lets him have sex. When the testosterone hormone is produced, it allows the blood to fill the tissue in the penis, hence causing an erection. People with low levels of testosterone have difficulty producing and maintaining erections, so they resort to drugs to help them.

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Oxytocin, also known as the “cuddle hormone” is released in males and females during orgasm. It causes contractions along nerve impulses to try to bring the male and female closer together and make an emotional connection.

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Adrenaline is another hormone released during sex. Adrenaline dilates the arteries, letting a larger amount of blood flow through them. It also makes the heart beat faster so you can have a greater performance. This hormone is released when you are afraid or excited. It helps you go faster and harder without getting tired quickly.

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Prolactin is a hormone released after an orgasm. It helps relieve the mind of sexual tension and arousal for a while. It also puts you in a satisfied mood, so if your girl gets mad at you for falling asleep right after sex, tell her it’s not your fault-it’s science!

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Before and during sex, the body releases endorphins. Endorphins put you in a calming and happy mood, and they can also make you feel dizzy or sleepy. This is why after sex you feel kind of lethargic-the sudden rush of endorphins and sexercise has gotten you too tired to do anything else!

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After orgasm, a hormone called seratonin is released from the brain into the bloodstream. Seratonin acts as a mood regulator and an anti depressant. Right after sex, it makes you feel blissful and satisfied.

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Another chemical released in males during sex is vasopressin. It has been recorded that during erection, the amount of vasopressin increases in the bloodstream, but after ejaculation it decreases rapidly. Scientists say that this hormone is the driving force of sex. Its evolution’s way of ensuring that a male is motivated enough to have sex to produce offspring so that the human race continues to live on.

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Estrogen is a hormone released in women when they are extremely fertile. Estrogen promotes feelings of sexual desire and helps their sex drive. However, estrogen is also released when a woman becomes sexually aroused around her partner. So next time your girl gets horny, you have estrogen to thank for it!

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When you kiss your special someone, you may have noticed that’s the exact moment you become sexually aroused. Kissing is a gateway to all things sexual because it makes a huge chunk of your brain active. It also releases testosterone, estrogen, endorphins, oxytocin and other hormones to immediately build up your sex drive. Also, kissing is great for the lips and skin because it promotes blood circulation, so kiss your girl asap!