Heat period

I have a theory, if you will, based on a sample population of one. I believe that unlike popular belief humans do have a heat period. I believe that there must have been a time when humans like other mammals did have a period during which sexual activity would spike. However, humans, being the big evolvers that they are, figured out sometime down the line that they do not have to limit themselves to 3-4 months a year. They could, and they did, start copulating whenever they felt like it. Their adaptability fudged the distinct signs of heat periods. But if you pay attention there are clearly periods during which the libido touches the roof, when each and every member of the opposite sex seems to raise the barometer.

Now please don't call me crazy. You also don't have to jump right on and point out that the sample population is just too small. If you are not convinced, just do a google. Scientists are in fact looking at hidden heat periods in females. My theory is not that crazy, now is it?