Sexuality

What I can't wrap my head around sexuality is how much it has changed over time, and how different it is in each culture/country. In the years way way before, men would be able to have sexual relationships withe men and women, and they would also be able to have a sexual relationship with younger males and females. Women would also be able to have relationships with people of their same sex. The more power a person had the more choice he or she would have. Today, it is illegal to have a sexual relationship with younger kids under the age of 18. Even I believe that pedophiles are sick people, but before it would be completely normal for there to be pedophiles, and people like "cougars".