Since the beginning of time every living thing has been genetically programmed to procreate in order to continue the species. In the animal kingdom, having sex is the method by which offspring are created and born, thus maintaining each species. This genetic programming includes the highest of the species… man.
You may have heard people refer to the “raging hormones of teens.” That’s because the hormones which genetically kick in during preteen and early teen years are the ones which create the sex drive for both girls and guys; and this causes very new, different, and strong feelings and emotions which you have never felt before.
The end result of all this is that the male of any animal species is programmed to go out and impregnate a female, and that applies to humans as well. At the same time, girls are programmed to be receptive of a mate in order to get pregnant and continue the species. The continuation of the human race, however, is also affected by the intellectual responsibilities of mankind, community morals, religious beliefs, and other factors. Consequently, instead of simply following their animal instincts, humans are separated from the animal kingdom by their high intellect; and they must use this intellect to restrain themselves and take responsibility for their actions rather than just going out and procreating all over the place.
Now this is especially tough on the guys, as that male sex drive is strongest between the ages of 17 and 21.
Girls, on the other hand, have the strongest sex drive during monthly ovulation, that time of the month when you WILL get pregnant if you have sex. This makes logical sense when viewed from the context of evolution. Ovulation is the most fertile phase for women, and increased interest in and responsiveness to sex during this time ensures greater probability of conception and procreation than at other times of your monthly cycle. This increase in sex drive has been attributed to increases in estrogen, progesterone, and testosterone, and generally kicks in anywhere from a few days before ovulation until ovulation is over. So if you don’t want to get pregnant, beware of this heightened desire.
In spite of all this genetic programming, it is not an excuse to allow your animal instincts to overpower your intellect to the detriment of your life and future plans.