The holiday season is a busy time, and according to studies, it is also the best time to get busy.

There is a scientific reason for why so many babies are born in September.

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According to experts, in a study conducted by University of Texas’ School of Public Health and Department of Obstetrics and School of Medicine, the majority of babies are conceived around Christmas time.

This seasonal spike comes from a combination of improved sperm quality and ovum receptivity, as well as a rise in sexual activity during the winter months.

The study explored the correlation between seasonal changes and conception, and concluded that sperm quality is often in decline during the summer. Changes in daylight length also affects “the anterior pituitary-ovarian function, the variation in quality of the ovum or endometrial receptivity.”

However, biological body changes aren’t the only reason why people are getting busier around winter.

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A drop in temperature has been proven to result in a rise of couples’ playtime habits. Science, or a mistletoe, doesn’t need to tell us that the more you bone, the more likely of pregnancy.

The study said, “Increased sexual activity associated with end-of-year holiday festivities has also been postulated as a possible behavioural explanation for the December peak in conceptions.”

Although more than twice as many condoms are sold in the week leading up to Christmas, research published in the Journal of the Royal Society of Medicine, has found that many people will inevitably engage in unprotected sex around this time of year.

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The scientists concluded: “These data highlight the fact that seasonally related social events may increase levels of sexual activity, decrease the likelihood that it will be protected, and limit access to services.”

A heatmap, created by Matt Stiles, based on data compiled by FiveThirtyEight, show that of the daily births in the United States, from 1994-2014, the most common birthday is September 9, with September 19 coming in second, on average.

This means that the estimated conception dates would therefore be December 17 and December 27.

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So, is there a method to the sex madness? Apparently, children born in September fare very well in comparison to their classmates.

Experts from the National Bureau of Economic Research said that babies born in September tend to excel academically. Their findings showed that those few extra months of development prove very beneficial for these September babies.

Adversely, babies born in August tend to struggle more when they start school due to, on average, lower levels of maturity.

So how can you spread your holiday cheer, whether you are planning a baby or not?

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For the gifts that keep on giving, here are 5 holiday sex positions to tis the season, or, to cure your Grinchy mood from No Nut November:

1. Ms. Claus on Top

On a chair, get naughty and sit on Santa’s lap for a merry orgasm.

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2. Festive Wreath

One partner climbs on top of the partner sitting cross-legged, and wraps their legs around them. It's really close and intimate, and also allows for deep penetration.

3. Shabbat Candle

All of the benefits of spoon-style sex, but with the added intimacy. Locking eyes during sex — or even better, during orgasm — is not only passionate, but perfect for the cuddly holiday season.

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4. Reindeer-style

Romance is in the air… and so is her ass. Spank her until her butt is as red as rudolph’s nose.

5. Elf on the Shelf

Have the receiver on their back with their legs raised and folded over, with ankles are on either side of your head, while Santa’s helper squats and dips in and out. 

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