People need to quit defining things to try and prove their intellectual capabilities. Here's a hint: no one cares, we all use words loosely based on how we perceive them. And usually it's pretty clear what that person means by that word based on how it's used in the sentence, we don't need Webster's input every time either, it's redundant.
That being said, the idea of DP isn't very appealing to me as a guy, though another girl and a strap-on can make a DP sound great!