Hormone changes during pregnancy, just after having a baby and during breast-feeding can put a damper on sex drive. So when you've gone a while without any nookie, you might notice that your stress level builds up. Your brain turns to mush Shutterstock Memory loss and absent-mindedness are huge side effects of going without sex. One study determined that those who had sex over a two week period had significantly lower blood pressure levels than those who were without sex, or even compared those who masturbated or participated in sexual activities that excluded intercourse. Have you ever noticed that nearly every time you've gotten an infection it was right after having sex? Your vaginal walls weaken Shutterstock It seems that over the age of 50 or so, women risk not feeling any pleasure during sex if they don't have intercourse regularly. It's also possible you're just focused on other things in your life and don't feel like you're missing anything by not having sex. Here's what you can expect to happen when you're not having regular sex. You'll learn new coping skills Shutterstock There's a silver lining to be found in most situations, and that apparently includes what happens to you when you stop having sex for a while. If you're bothered by a low sex drive or decreased sex drive, there are lifestyle changes and sexual techniques that may put you in the mood more often. According to Woman's Day , light kissing burns about 68 calories per hour, but you can burn around calories making out. Psychological causes Your state of mind can affect your sexual desire. Print Overview Women's sexual desires naturally fluctuate over the years. Usually it's just a yeast infection or the result of some seriously tight jeans, but not having sex means you no longer have to worry — about most STIs at least. So, if it's been a while since you've gotten lucky, you may get a little present in the middle of the night.