Historically, the Leisure Suit Larry series is somewhat interesting. Back in the 80s, Sierra Online were mainly known for their family friendly King's Quest series of games. Despite that, they decided to take a risk and developed a sexual comedy game aimed at adults.
It sold poorly at first. The first month's sales were abysmal. But every month after that the sales doubled, eventually becoming a great selling title. It also became known for its high piracy rate: they sold more hintbooks for Leisure Suit Larry than copies of the game.
Sierra went on to make 6 sequels, the last one was released in 1996. To date, it is the only high profile game series that focused on sex as a primary objective.
Many of the best selling games these days could be classified as glorified murder simulators. Many are simulations of war where surviving gun fire and killing hundreds of enemies make up the core gameplay.
I'm not about to suggest that the Leisure Suit Larry games are paragons of game design. By today's standards they can be quite frustrating and tedious. But it is interesting that the industry is so against games that are sexual in nature, yet proudly parades around so many violent titles.
Violence is generally considered a bad thing in society, and sex is something that most people will enjoy and is quite necessary for the human race to continue. Here's my question: is the video game industry focusing on the wrong kind of content? Should we see more games where sex is the focus instead of violence?