The often-overlooked pragmatics of DP:
- your individual and collective physical condition play a role in which DP positions are comfortable, or in some cases, possible - body type, flexibility, etc are all factors
- the cock sizes, both length, and girth of the 'penetrators', relative to the 'penatrent' - if the penetrant can't accommodate one of the cocks in her ass, that factors in
- the other big surprise to novices is how fast the guys cum - sometimes the sensation is so intense both guys will cum before actually completing the act
It's definitely worth the effort. We worked our way through it, from traditional vaginal-anal, to DVP, and finally one success at DAP.