Why are there so many sexual cultures

Why are there so many sexual cultures

Look at the video and answer the question below in 3 paragraph.

Why are there so many sexual cultures?

Many faces of human sexuality

https://www.youtube.com/watch?v=aI-Ojb1zOpY

Sex education

https://www.youtube.com/watch?v=uCiTEWWuaSg

http://blog.ted.com/beyond-where-babies-come-from-talks-for-asking-tough-questions-about-sex/