You might want to look for "The Complete Sex Guide" on You Tube. Based in Britain, it has some interesting content. In many ways, the material could remove much stigma from use of prostate stimulation techniques. Good viewing! Do not be fooled by the female orientation by the narrators. The content will benefit both sexes.
Got a link?
Guys,
This is the compilation of a series of sex education programs apparently aired on TV in Britain. The YouTube video The Complete Sex Guide is 4 hours and 28 minutes long. There may not be much focus on men's prostates in this video, nonetheless as 'Boot' noted, there is beneficial information for all.
Good Vibes to You !