Dr. Richard Krueger's Interview with WebMD

February 1, 2015
Blurb
“Whether somebody is doing this by themselves or with a partner, if they’re happy with it, then it’s not an issue," Krueger says, as long as it causes pleasure and no one is being forced to take part.
Read more: http://www.webmd.com/sex-relationships/features/sexual-fetish?page=2