Advantages - Very comfortable, pleasurable for the woman.
Disadvantages - There are disadvantages? There are no disadvantages, unless you hate comfort and orgasms.
Girl #2 - Great, obviously.
Girl #1 - Why obviously?
Girl #2 - We did the doggy pancake. Win! I mean, I came like 47 times.
Girl #1 - (To random male passerby) Hey you! Come here! We're doing the doggy pancake! Lose the pants!