Sexual desire declines after four to seven years. That's been proven.

Sexual desire declines after four to seven years. That's been proven.

Good sex can be anything, including dirty.

Internet sexuality shows that we're becoming more and more self-involved. I'm talking about self-sex.

Some 95 percent of all sexual contact still occurs in permanent relationships. That's an impressive number.

There are many options in a marriage. If the couple has been together for a certain amount of time and has a certain amount of liberalism or life experience, it could be the kind of relationship in which one partner ventures into the occasional affair, which is then forgiven. This only happens every 13 years on average, but it obviously does occur.

Key feature of sexual revolution is the large-scale publication and commercialization of details that were once secret. Sexuality has been trivialized. The interesting thing about this is that exaggerated portrayals apparently destroy desire more effectively than any repression.