Here is United Nations report on adolescent sexuality around the world, compiled by a 21-year-old law student from the West Indes who serves as an ambassador for AIDS awareness and integration. in the Caribbean.
This article from Psychology Today considers reasons why sexual activity has been dropping among teenagers today. "Disruptive technologies" (particularly the rise of social media and internet pornography) are discussed as significant factors.
Here's a recent report from Fortune magazine about how Gen Z is "redefining sex" and shifting ideas about sex and sexual intercourse.
For a detailed overview of puberty--with information specific to biologically male and female bodies--check out the Cleveland Clinic's reference page.
The magazine Medical News Today also publishes a useful guide to puberty.
Webster University's site has good information on how the society depicted in Wedekind's original play viewed these topics (follow the links below):