Sex: Reproduction or Pleasure?

In chapter 10, Dawkins explained the basic behavior of ants of bees that are part of the group of “social insects.” He gave a very thorough explanation of how this community of “social insects” functions. There are two types of insects, like two social classes. The most important is the queen and then there´s the workers. The role of the workers is to keep the community going and to satisfy the queen. (By satisfy I don´t mean like presents or massages, just feed her and keep her alive.) The role of the queen is to live and reproduce herself. One of the most interesting things is the way she reproduces herself. Instead of mating with a male each time she wants to reproduce, she does it only ones and stores the sperm of the mate, to be used further one. In this community of insects, sex is only used for reproduction. That is the main reason why insects and animal mate, with the exception of humans.  Even though the main purpose of sex in humans is also reproduction, many do it for pleasure. This is why condoms, anti-conceptive or many other prevention methods exist. Many happy couples of single people want to have sex in order to reproduce and have a baby but most of the people today, want to have sex in order to entertain themselves. I don´t know it that is a sign of intelligence or stupidity but people could argue both. A stronger believer in the first option would say that humans are more intelligent because they have discovered other things that sex can offer. A believer of the latter can argue and say that it is not an intelligent thing to do because thanks to unprotected sex and the wild imagination of humans many people have died. To make myself clear, through sex one can get many diseases that can end up killing a person. If the companion is not a known person, the stakes of this occurring are very high. Is it worth it risking one´s health for the “pleasure and entertainment” of one night?