Why is intercourse fun?

Answer 1

Sex is very important in a number of ways, but also has the potential to be very damaging emotionally and physically -- the correct moderation and discipline in sexual practices decides whether or not, individually, sex can become an important part of one's overall physical health.

Psychologically, humans are hard wired for certain needs. Emotional and physical needs are present in everyone, and specifically in romantic relationships sex becomes an important part in keeping these needs in balance to promote better welfare for both partners. In this way, we can infer mentally that sex has a strong coorelation with positive emotions. In other ways, common in abuse and/or overuse of sexual practices, sex can be damaging. The consequences of such uses are too extensive to list here.

Physically, sex is healthy for a number of reasons. First off, it's a cardiovascular exercise which requires strength and endurance, of course with varying degrees depending on you and your partners preferences. Secondly, the emotional gratification you and your partner receive for not only the romantic connection (see: pleasure and the responses it creates), but the cardiovascular exercise (see: adrenaline and other chemicals released) together create a very powerful physical response. The field of psychiatry has done a large amount of studies showing the strong positive coorelation between low stress levels (which sex eases, among other things) and overall physical health. I'm sure the field of Neuroscience also has a large amount of studies showing the physical affect of sex on the body, but I am not able to cite any of them.

The physical and psychological advantages, given the appropriate practice and application of sexual behavior, are very much enough to prove that sex is a healthy part of any individuals lifestyle. Of course, factors like age, emotional maturity, and social circumstances are all variables that need to be accounted for; it's not an easy question with one answer at any given time.

Regardless, sex is as natural as breathing. These days though, people have a tendency to misuse it as a coping mechanism for loneliness, depression, misplaced feelings, and other such issues. Especially for virgins, before taking a leap of faith into the world of sexual experiences it's often best to examine yourself and realize whether or not you're ready for the responsibility you take for yourself and others.

Answer 2

(1) That's how we get descendants. (2) People engage in sexual intercourse because it is very pleasant.

Answer 3

Intercourse is the method used to "make children". Since this is a requirement for the survival of a species, individuals quite naturally feel the desire to have intercourse.